Advent Calendarを立てた人自身は何日目にエントリーするのか調べてみた

空いてたので [Advent Calendar 紹介 Advent Calendar 2016](http://qiita.com/advent-calendar/2016/advent-calendar) の4日目です。

ふと、「AdventCalendarを立てた人自身は何日目にエントリーするんだろう？」「AdventCalendarを立てて自分自身はエントリーしないパターンがどれくらいあるんだろう？」というのが気になったので調べてみました。

予想としては、最初の方と最後の方が多く、かつ執筆しやすい週末が多い、です。

調査対象は、12/3(木)22時頃の時点でQiitaに開かれていたAdventCalendar 499件です。AdventCalendarを立てた当人が複数(あるいは全部)エントリしている場合は、それらをすべて数えています。

## AdventCalendarを立てた人自身は何日目にエントリーするか

こんな感じになりました。

| 日 | 月 | 火 | 水 | 木 | 金 | 土 |
|:-:|:-:|:-:|:-:|:-:|:-:|:-:|
|   |   |   |   | 1 <br> 256人 | 2 <br> 116人 | 3 <br> 95人 |
| 4 <br> 74人 | 5 <br> 63人 | 6 <br> 60人 | 7 <br> 52人 | 8 <br> 61人 | 9 <br> 49人 | 10 <br> 49人 |
| 11 <br> 52人 | 12 <br> 49人 | 13 <br> 42人 | 14 <br> 42人 | 15 <br> 49人 | 16 <br> 42人 | 17 <br> 44人 |
| 18 <br> 52人 | 19 <br> 38人 | 20 <br> 46人 | 21 <br> 37人 | 22 <br> 39人 | 23 <br> 45人 | 24 <br> 50人 |
| 25 <br> 91人 |   |   |   |   |   |   |

最初の3日が極端に多く、次いで最終日ですね。土日はやや多いくらいでしょうか。やっぱりと言うか、最終週の平日はいちばん人気がありません。

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## AdventCalendarを立てて自分自身はエントリーしないパターンがどれくらいあるか

54件でした。これは全体の約11％です。

せっかくAdventCalendar立てたなら、1件くらいエントリ書いてもいいんじゃない…？と思ったけど、埋まったから次のを立てたパターンぽいのもあり、一概に書いてないとも言い切れないのが難しいですね。

## 調査対象のAdventCalendarの一覧

* http://qiita.com/advent-calendar/2016/soracom
* http://qiita.com/advent-calendar/2016/foss4gvol2
* http://qiita.com/advent-calendar/2016/kayac-unity
* http://qiita.com/advent-calendar/2016/kayac
* http://qiita.com/advent-calendar/2016/play_java
* http://qiita.com/advent-calendar/2016/hunachi-shoujin0-algorithm0
* http://qiita.com/advent-calendar/2016/supership
* http://qiita.com/advent-calendar/2016/isc
* http://qiita.com/advent-calendar/2016/waseda
* http://qiita.com/advent-calendar/2016/aws
* http://qiita.com/advent-calendar/2016/scoville
* http://qiita.com/advent-calendar/2016/xaml
* http://qiita.com/advent-calendar/2016/give_me_kareshi
* http://qiita.com/advent-calendar/2016/tech-camp2
* http://qiita.com/advent-calendar/2016/wano-group
* http://qiita.com/advent-calendar/2016/gpd-win
* http://qiita.com/advent-calendar/2016/moneyforward
* http://qiita.com/advent-calendar/2016/cocos2dx
* http://qiita.com/advent-calendar/2016/iridge
* http://qiita.com/advent-calendar/2016/metal
* http://qiita.com/advent-calendar/2016/fujitsu
* http://qiita.com/advent-calendar/2016/make-system-by-php
* http://qiita.com/advent-calendar/2016/val
* http://qiita.com/advent-calendar/2016/colorful-board
* http://qiita.com/advent-calendar/2016/it_event_de_jgc
* http://qiita.com/advent-calendar/2016/newborn-baby-monitoring
* http://qiita.com/advent-calendar/2016/maya-python
* http://qiita.com/advent-calendar/2016/iosdc
* http://qiita.com/advent-calendar/2016/php_beginner
* http://qiita.com/advent-calendar/2016/vaddy
* http://qiita.com/advent-calendar/2016/classi
* http://qiita.com/advent-calendar/2016/flasher2
* http://qiita.com/advent-calendar/2016/prolog
* http://qiita.com/advent-calendar/2016/filemaker-tips
* http://qiita.com/advent-calendar/2016/holydisupute
* http://qiita.com/advent-calendar/2016/perl6
* http://qiita.com/advent-calendar/2016/redis
* http://qiita.com/advent-calendar/2016/perl5
* http://qiita.com/advent-calendar/2016/ibmmobilefirst
* http://qiita.com/advent-calendar/2016/typescript
* http://qiita.com/advent-calendar/2016/tateditor
* http://qiita.com/advent-calendar/2016/salad
* http://qiita.com/advent-calendar/2016/slp_kbit2
* http://qiita.com/advent-calendar/2016/j2complexed
* http://qiita.com/advent-calendar/2016/one-minute
* http://qiita.com/advent-calendar/2016/make_editor
* http://qiita.com/advent-calendar/2016/rite
* http://qiita.com/advent-calendar/2016/ichigojam
* http://qiita.com/advent-calendar/2016/onsenui
* http://qiita.com/advent-calendar/2016/rakuten
* http://qiita.com/advent-calendar/2016/technology-of-adebis
* http://qiita.com/advent-calendar/2016/tech-camp
* http://qiita.com/advent-calendar/2016/varnish
* http://qiita.com/advent-calendar/2016/vim8
* http://qiita.com/advent-calendar/2016/microsoft-azure2
* http://qiita.com/advent-calendar/2016/lit-members
* http://qiita.com/advent-calendar/2016/horse_race_investment
* http://qiita.com/advent-calendar/2016/ueqareer
* http://qiita.com/advent-calendar/2016/postcss
* http://qiita.com/advent-calendar/2016/c_sharp_tutorial
* http://qiita.com/advent-calendar/2016/retty
* http://qiita.com/advent-calendar/2016/cdatasoftware
* http://qiita.com/advent-calendar/2016/flashers
* http://qiita.com/advent-calendar/2016/digiq-tech
* http://qiita.com/advent-calendar/2016/gitlab
* http://qiita.com/advent-calendar/2016/houdini
* http://qiita.com/advent-calendar/2016/slp_kbit
* http://qiita.com/advent-calendar/2016/schoo
* http://qiita.com/advent-calendar/2016/life-is-tech
* http://qiita.com/advent-calendar/2016/idcfcloud
* http://qiita.com/advent-calendar/2016/jubatus
* http://qiita.com/advent-calendar/2016/etrobo
* http://qiita.com/advent-calendar/2016/luigi-by-yutaka_1119
* http://qiita.com/advent-calendar/2016/alteryx
* http://qiita.com/advent-calendar/2016/free_zankoku
* http://qiita.com/advent-calendar/2016/test
* http://qiita.com/advent-calendar/2016/stv
* http://qiita.com/advent-calendar/2016/iot_testing
* http://qiita.com/advent-calendar/2016/hsp
* http://qiita.com/advent-calendar/2016/acairojuni
* http://qiita.com/advent-calendar/2016/video_streaming
* http://qiita.com/advent-calendar/2016/sekaie
* http://qiita.com/advent-calendar/2016/powershell
* http://qiita.com/advent-calendar/2016/ue4gamenyumon
* http://qiita.com/advent-calendar/2016/hardware
* http://qiita.com/advent-calendar/2016/fromscratch
* http://qiita.com/advent-calendar/2016/origami
* http://qiita.com/advent-calendar/2016/wondershake
* http://qiita.com/advent-calendar/2016/mac
* http://qiita.com/advent-calendar/2016/vvvv
* http://qiita.com/advent-calendar/2016/rsl
* http://qiita.com/advent-calendar/2016/rubymine
* http://qiita.com/advent-calendar/2016/netbsd
* http://qiita.com/advent-calendar/2016/idd
* http://qiita.com/advent-calendar/2016/hodgepodge
* http://qiita.com/advent-calendar/2016/yahoojapan-tech
* http://qiita.com/advent-calendar/2016/tokyo_university_of_science
* http://qiita.com/advent-calendar/2016/rakus
* http://qiita.com/advent-calendar/2016/techscore
* http://qiita.com/advent-calendar/2016/processing
* http://qiita.com/advent-calendar/2016/agile
* http://qiita.com/advent-calendar/2016/aratana
* http://qiita.com/advent-calendar/2016/mpsamurai
* http://qiita.com/advent-calendar/2016/transaction
* http://qiita.com/advent-calendar/2016/kubernetes
* http://qiita.com/advent-calendar/2016/null_safe
* http://qiita.com/advent-calendar/2016/neo4j
* http://qiita.com/advent-calendar/2016/php-design-pattern
* http://qiita.com/advent-calendar/2016/mathematica
* http://qiita.com/advent-calendar/2016/groonga
* http://qiita.com/advent-calendar/2016/ids2016
* http://qiita.com/advent-calendar/2016/gloops
* http://qiita.com/advent-calendar/2016/civictech
* http://qiita.com/advent-calendar/2016/qiita_improvement
* http://qiita.com/advent-calendar/2016/zabbix
* http://qiita.com/advent-calendar/2016/markdown
* http://qiita.com/advent-calendar/2016/hadoop-cm-ozawa
* http://qiita.com/advent-calendar/2016/amazon-quicksight-by-shinyaa31
* http://qiita.com/advent-calendar/2016/wdp
* http://qiita.com/advent-calendar/2016/distributed-computing
* http://qiita.com/advent-calendar/2016/mathcafe4d
* http://qiita.com/advent-calendar/2016/withone
* http://qiita.com/advent-calendar/2016/jupyter
* http://qiita.com/advent-calendar/2016/mysql-casual
* http://qiita.com/advent-calendar/2016/sue445
* http://qiita.com/advent-calendar/2016/mynet
* http://qiita.com/advent-calendar/2016/mti
* http://qiita.com/advent-calendar/2016/serverworks
* http://qiita.com/advent-calendar/2016/ue4_inside
* http://qiita.com/advent-calendar/2016/mongodb
* http://qiita.com/advent-calendar/2016/lancers
* http://qiita.com/advent-calendar/2016/enough
* http://qiita.com/advent-calendar/2016/firebird
* http://qiita.com/advent-calendar/2016/saitamagames
* http://qiita.com/advent-calendar/2016/rspec
* http://qiita.com/advent-calendar/2016/gstreamer
* http://qiita.com/advent-calendar/2016/opal
* http://qiita.com/advent-calendar/2016/notepad-plus-plus
* http://qiita.com/advent-calendar/2016/pepabo
* http://qiita.com/advent-calendar/2016/advent-calendar
* http://qiita.com/advent-calendar/2016/d3
* http://qiita.com/advent-calendar/2016/allabout
* http://qiita.com/advent-calendar/2016/static-site-generator
* http://qiita.com/advent-calendar/2016/yesod
* http://qiita.com/advent-calendar/2016/individual-developer
* http://qiita.com/advent-calendar/2016/spiral-s
* http://qiita.com/advent-calendar/2016/ace_of_spades
* http://qiita.com/advent-calendar/2016/creative-coding
* http://qiita.com/advent-calendar/2016/pixiv
* http://qiita.com/advent-calendar/2016/aizu2
* http://qiita.com/advent-calendar/2016/kitdev
* http://qiita.com/advent-calendar/2016/amp
* http://qiita.com/advent-calendar/2016/ios3
* http://qiita.com/advent-calendar/2016/faust
* http://qiita.com/advent-calendar/2016/techcircle
* http://qiita.com/advent-calendar/2016/interprism
* http://qiita.com/advent-calendar/2016/ergodox
* http://qiita.com/advent-calendar/2016/slack2
* http://qiita.com/advent-calendar/2016/m3
* http://qiita.com/advent-calendar/2016/gaiax
* http://qiita.com/advent-calendar/2016/erlang-solo
* http://qiita.com/advent-calendar/2016/accounting_saas_japan
* http://qiita.com/advent-calendar/2016/emoji
* http://qiita.com/advent-calendar/2016/openwhisk
* http://qiita.com/advent-calendar/2016/serverside
* http://qiita.com/advent-calendar/2016/openam-alone
* http://qiita.com/advent-calendar/2016/whiteplus
* http://qiita.com/advent-calendar/2016/mathematical_systems
* http://qiita.com/advent-calendar/2016/filemaker
* http://qiita.com/advent-calendar/2016/dena2
* http://qiita.com/advent-calendar/2016/fx_devtools
* http://qiita.com/advent-calendar/2016/streaming
* http://qiita.com/advent-calendar/2016/fukamachi-products
* http://qiita.com/advent-calendar/2016/job2
* http://qiita.com/advent-calendar/2016/ml4a
* http://qiita.com/advent-calendar/2016/freshman_engineer
* http://qiita.com/advent-calendar/2016/lifull
* http://qiita.com/advent-calendar/2016/vim2
* http://qiita.com/advent-calendar/2016/solaris
* http://qiita.com/advent-calendar/2016/esolang
* http://qiita.com/advent-calendar/2016/webaudiomidi
* http://qiita.com/advent-calendar/2016/math
* http://qiita.com/advent-calendar/2016/brightvie
* http://qiita.com/advent-calendar/2016/yes-girlfriend
* http://qiita.com/advent-calendar/2016/labview
* http://qiita.com/advent-calendar/2016/code_igniter
* http://qiita.com/advent-calendar/2016/dockerize
* http://qiita.com/advent-calendar/2016/netflixoss
* http://qiita.com/advent-calendar/2016/access
* http://qiita.com/advent-calendar/2016/iot-gadgets
* http://qiita.com/advent-calendar/2016/toreta
* http://qiita.com/advent-calendar/2016/gameengine
* http://qiita.com/advent-calendar/2016/hololens
* http://qiita.com/advent-calendar/2016/gas
* http://qiita.com/advent-calendar/2016/stan
* http://qiita.com/advent-calendar/2016/firefirestyle-studio
* http://qiita.com/advent-calendar/2016/softwaretesting
* http://qiita.com/advent-calendar/2016/eeic2
* http://qiita.com/advent-calendar/2016/redash
* http://qiita.com/advent-calendar/2016/titanium
* http://qiita.com/advent-calendar/2016/koil-csc
* http://qiita.com/advent-calendar/2016/robot
* http://qiita.com/advent-calendar/2016/julialang
* http://qiita.com/advent-calendar/2016/chat-bot
* http://qiita.com/advent-calendar/2016/datumstudio
* http://qiita.com/advent-calendar/2016/akerun
* http://qiita.com/advent-calendar/2016/play_scala
* http://qiita.com/advent-calendar/2016/hamee
* http://qiita.com/advent-calendar/2016/website-performance
* http://qiita.com/advent-calendar/2016/mediba
* http://qiita.com/advent-calendar/2016/quad-inc
* http://qiita.com/advent-calendar/2016/hpc
* http://qiita.com/advent-calendar/2016/illusion
* http://qiita.com/advent-calendar/2016/rstudio-ide
* http://qiita.com/advent-calendar/2016/podcast
* http://qiita.com/advent-calendar/2016/littlebits
* http://qiita.com/advent-calendar/2016/mythings
* http://qiita.com/advent-calendar/2016/sendgrid
* http://qiita.com/advent-calendar/2016/lint
* http://qiita.com/advent-calendar/2016/bitvisor
* http://qiita.com/advent-calendar/2016/conoha
* http://qiita.com/advent-calendar/2016/sakura2
* http://qiita.com/advent-calendar/2016/ceres-creative
* http://qiita.com/advent-calendar/2016/elixir2_and_phoenix
* http://qiita.com/advent-calendar/2016/ppx
* http://qiita.com/advent-calendar/2016/pronama-chan
* http://qiita.com/advent-calendar/2016/dena
* http://qiita.com/advent-calendar/2016/kstm
* http://qiita.com/advent-calendar/2016/analytics
* http://qiita.com/advent-calendar/2016/osmjp
* http://qiita.com/advent-calendar/2016/crystal
* http://qiita.com/advent-calendar/2016/istyle
* http://qiita.com/advent-calendar/2016/sakura
* http://qiita.com/advent-calendar/2016/r-rstudio
* http://qiita.com/advent-calendar/2016/dataviz
* http://qiita.com/advent-calendar/2016/cobol
* http://qiita.com/advent-calendar/2016/ansible
* http://qiita.com/advent-calendar/2016/cureapp
* http://qiita.com/advent-calendar/2016/eeic
* http://qiita.com/advent-calendar/2016/hekk_cacalia_studio
* http://qiita.com/advent-calendar/2016/queue_inc
* http://qiita.com/advent-calendar/2016/okinawago
* http://qiita.com/advent-calendar/2016/okinawarb
* http://qiita.com/advent-calendar/2016/recruitlifestyle
* http://qiita.com/advent-calendar/2016/eureka
* http://qiita.com/advent-calendar/2016/getwild
* http://qiita.com/advent-calendar/2016/a-hikkoshi
* http://qiita.com/advent-calendar/2016/phinajs
* http://qiita.com/advent-calendar/2016/vuls
* http://qiita.com/advent-calendar/2016/ezpublish
* http://qiita.com/advent-calendar/2016/owncloudjp
* http://qiita.com/advent-calendar/2016/serverless2
* http://qiita.com/advent-calendar/2016/diveintocode
* http://qiita.com/advent-calendar/2016/rust-lang-2
* http://qiita.com/advent-calendar/2016/glsl
* http://qiita.com/advent-calendar/2016/d-man
* http://qiita.com/advent-calendar/2016/dip-dev
* http://qiita.com/advent-calendar/2016/devrel
* http://qiita.com/advent-calendar/2016/vtecx
* http://qiita.com/advent-calendar/2016/selenium_and_appium
* http://qiita.com/advent-calendar/2016/retro-lisp
* http://qiita.com/advent-calendar/2016/syoroumaru
* http://qiita.com/advent-calendar/2016/build-pc-diy
* http://qiita.com/advent-calendar/2016/ipu
* http://qiita.com/advent-calendar/2016/excite
* http://qiita.com/advent-calendar/2016/glboost
* http://qiita.com/advent-calendar/2016/moodle
* http://qiita.com/advent-calendar/2016/myuon
* http://qiita.com/advent-calendar/2016/webaudio
* http://qiita.com/advent-calendar/2016/kosodate-engineer
* http://qiita.com/advent-calendar/2016/bookthankyou
* http://qiita.com/advent-calendar/2016/shinosakarb
* http://qiita.com/advent-calendar/2016/math_for_ml
* http://qiita.com/advent-calendar/2016/docker2
* http://qiita.com/advent-calendar/2016/grimoire
* http://qiita.com/advent-calendar/2016/foss4g
* http://qiita.com/advent-calendar/2016/formal-method
* http://qiita.com/advent-calendar/2016/stk
* http://qiita.com/advent-calendar/2016/twilio
* http://qiita.com/advent-calendar/2016/njc
* http://qiita.com/advent-calendar/2016/shanon
* http://qiita.com/advent-calendar/2016/sra
* http://qiita.com/advent-calendar/2016/javascript
* http://qiita.com/advent-calendar/2016/geb
* http://qiita.com/advent-calendar/2016/jetbrains
* http://qiita.com/advent-calendar/2016/atrae
* http://qiita.com/advent-calendar/2016/muscle
* http://qiita.com/advent-calendar/2016/react-native
* http://qiita.com/advent-calendar/2016/windows
* http://qiita.com/advent-calendar/2016/recommend-engine
* http://qiita.com/advent-calendar/2016/monstar-lab
* http://qiita.com/advent-calendar/2016/intelligence
* http://qiita.com/advent-calendar/2016/ojisan
* http://qiita.com/advent-calendar/2016/influxdb
* http://qiita.com/advent-calendar/2016/mruby
* http://qiita.com/advent-calendar/2016/cocoa
* http://qiita.com/advent-calendar/2016/fincdevelopers
* http://qiita.com/advent-calendar/2016/nextscape-media-delivery-dept
* http://qiita.com/advent-calendar/2016/aftereffects
* http://qiita.com/advent-calendar/2016/symfony
* http://qiita.com/advent-calendar/2016/opencv
* http://qiita.com/advent-calendar/2016/firstserver
* http://qiita.com/advent-calendar/2016/appresso
* http://qiita.com/advent-calendar/2016/nextremer
* http://qiita.com/advent-calendar/2016/freee
* http://qiita.com/advent-calendar/2016/wacul
* http://qiita.com/advent-calendar/2016/bluetooth_low_energy
* http://qiita.com/advent-calendar/2016/haskell-performance
* http://qiita.com/advent-calendar/2016/xamarin-welcome
* http://qiita.com/advent-calendar/2016/qt
* http://qiita.com/advent-calendar/2016/goodpatch
* http://qiita.com/advent-calendar/2016/javascriptrobotics
* http://qiita.com/advent-calendar/2016/nosql-newsql
* http://qiita.com/advent-calendar/2016/fusic
* http://qiita.com/advent-calendar/2016/theorem-prover
* http://qiita.com/advent-calendar/2016/poet
* http://qiita.com/advent-calendar/2016/frontend-engineers
* http://qiita.com/advent-calendar/2016/hortonworks
* http://qiita.com/advent-calendar/2016/go3
* http://qiita.com/advent-calendar/2016/vb
* http://qiita.com/advent-calendar/2016/ros
* http://qiita.com/advent-calendar/2016/netopscoding
* http://qiita.com/advent-calendar/2016/no-girlfriend-ml
* http://qiita.com/advent-calendar/2016/chainer
* http://qiita.com/advent-calendar/2016/android_third
* http://qiita.com/advent-calendar/2016/tokyosw
* http://qiita.com/advent-calendar/2016/payara
* http://qiita.com/advent-calendar/2016/javafx
* http://qiita.com/advent-calendar/2016/java_puzzlers
* http://qiita.com/advent-calendar/2016/newrelic
* http://qiita.com/advent-calendar/2016/redux
* http://qiita.com/advent-calendar/2016/cogbot
* http://qiita.com/advent-calendar/2016/communication
* http://qiita.com/advent-calendar/2016/fess
* http://qiita.com/advent-calendar/2016/lang_dev
* http://qiita.com/advent-calendar/2016/aizu
* http://qiita.com/advent-calendar/2016/kusanagi
* http://qiita.com/advent-calendar/2016/solr
* http://qiita.com/advent-calendar/2016/cakephp3
* http://qiita.com/advent-calendar/2016/gcp2
* http://qiita.com/advent-calendar/2016/dartlang
* http://qiita.com/advent-calendar/2016/cybird
* http://qiita.com/advent-calendar/2016/smalltalk
* http://qiita.com/advent-calendar/2016/machine-learning
* http://qiita.com/advent-calendar/2016/css
* http://qiita.com/advent-calendar/2016/gsacademy
* http://qiita.com/advent-calendar/2016/railsgirlsjapan
* http://qiita.com/advent-calendar/2016/gastah
* http://qiita.com/advent-calendar/2016/elm
* http://qiita.com/advent-calendar/2016/overlay-network
* http://qiita.com/advent-calendar/2016/dlang
* http://qiita.com/advent-calendar/2016/dot-emacs
* http://qiita.com/advent-calendar/2016/kintone
* http://qiita.com/advent-calendar/2016/productowner
* http://qiita.com/advent-calendar/2016/lisp
* http://qiita.com/advent-calendar/2016/productmanager
* http://qiita.com/advent-calendar/2016/electron
* http://qiita.com/advent-calendar/2016/love_swift
* http://qiita.com/advent-calendar/2016/ml
* http://qiita.com/advent-calendar/2016/raytracing
* http://qiita.com/advent-calendar/2016/engraphia
* http://qiita.com/advent-calendar/2016/haskell
* http://qiita.com/advent-calendar/2016/event-management
* http://qiita.com/advent-calendar/2016/the-c-programming-language
* http://qiita.com/advent-calendar/2016/freebsd
* http://qiita.com/advent-calendar/2016/chatbot
* http://qiita.com/advent-calendar/2016/erlang
* http://qiita.com/advent-calendar/2016/unity2
* http://qiita.com/advent-calendar/2016/ue4
* http://qiita.com/advent-calendar/2016/altplus
* http://qiita.com/advent-calendar/2016/tensorflow
* http://qiita.com/advent-calendar/2016/mithriljs
* http://qiita.com/advent-calendar/2016/nim
* http://qiita.com/advent-calendar/2016/vr
* http://qiita.com/advent-calendar/2016/azure
* http://qiita.com/advent-calendar/2016/serverless
* http://qiita.com/advent-calendar/2016/bluemix
* http://qiita.com/advent-calendar/2016/fablic
* http://qiita.com/advent-calendar/2016/iotlt
* http://qiita.com/advent-calendar/2016/se
* http://qiita.com/advent-calendar/2016/atom
* http://qiita.com/advent-calendar/2016/mackerel
* http://qiita.com/advent-calendar/2016/laravel
* http://qiita.com/advent-calendar/2016/scala
* http://qiita.com/advent-calendar/2016/dwango2
* http://qiita.com/advent-calendar/2016/seattleconsulting
* http://qiita.com/advent-calendar/2016/datadog
* http://qiita.com/advent-calendar/2016/webgl
* http://qiita.com/advent-calendar/2016/a-frame
* http://qiita.com/advent-calendar/2016/litalico
* http://qiita.com/advent-calendar/2016/mixi
* http://qiita.com/advent-calendar/2016/emacs
* http://qiita.com/advent-calendar/2016/git
* http://qiita.com/advent-calendar/2016/threejs
* http://qiita.com/advent-calendar/2016/salesforce-app-cloud
* http://qiita.com/advent-calendar/2016/slack
* http://qiita.com/advent-calendar/2016/qnote
* http://qiita.com/advent-calendar/2016/drupal
* http://qiita.com/advent-calendar/2016/n-highschool
* http://qiita.com/advent-calendar/2016/opt-technologies
* http://qiita.com/advent-calendar/2016/ios2
* http://qiita.com/advent-calendar/2016/klab
* http://qiita.com/advent-calendar/2016/actindi
* http://qiita.com/advent-calendar/2016/bot
* http://qiita.com/advent-calendar/2016/future
* http://qiita.com/advent-calendar/2016/nifty
* http://qiita.com/advent-calendar/2016/delphi
* http://qiita.com/advent-calendar/2016/realm
* http://qiita.com/advent-calendar/2016/software-architecture
* http://qiita.com/advent-calendar/2016/react
* http://qiita.com/advent-calendar/2016/application-jiman
* http://qiita.com/advent-calendar/2016/translation
* http://qiita.com/advent-calendar/2016/dwango
* http://qiita.com/advent-calendar/2016/vscode
* http://qiita.com/advent-calendar/2016/geekwomenjapan
* http://qiita.com/advent-calendar/2016/fsharp
* http://qiita.com/advent-calendar/2016/go2
* http://qiita.com/advent-calendar/2016/ec-cube
* http://qiita.com/advent-calendar/2016/unity-asset
* http://qiita.com/advent-calendar/2016/oculus-rift
* http://qiita.com/advent-calendar/2016/gumi
* http://qiita.com/advent-calendar/2016/python
* http://qiita.com/advent-calendar/2016/ouch-hack
* http://qiita.com/advent-calendar/2016/android_second
* http://qiita.com/advent-calendar/2016/aktsk
* http://qiita.com/advent-calendar/2016/vs
* http://qiita.com/advent-calendar/2016/siv3d
* http://qiita.com/advent-calendar/2016/deeplearning
* http://qiita.com/advent-calendar/2016/new-graphics
* http://qiita.com/advent-calendar/2016/clojure
* http://qiita.com/advent-calendar/2016/heroku
* http://qiita.com/advent-calendar/2016/augtokyo
* http://qiita.com/advent-calendar/2016/docker
* http://qiita.com/advent-calendar/2016/elastic
* http://qiita.com/advent-calendar/2016/nijibox
* http://qiita.com/advent-calendar/2016/law
* http://qiita.com/advent-calendar/2016/elixir
* http://qiita.com/advent-calendar/2016/hal
* http://qiita.com/advent-calendar/2016/blockchain
* http://qiita.com/advent-calendar/2016/esp8266
* http://qiita.com/advent-calendar/2016/microservices
* http://qiita.com/advent-calendar/2016/rxswift
* http://qiita.com/advent-calendar/2016/vim
* http://qiita.com/advent-calendar/2016/python_python
* http://qiita.com/advent-calendar/2016/http2
* http://qiita.com/advent-calendar/2016/dotstudio
* http://qiita.com/advent-calendar/2016/student
* http://qiita.com/advent-calendar/2016/security
* http://qiita.com/advent-calendar/2016/netcore
* http://qiita.com/advent-calendar/2016/asp-net
* http://qiita.com/advent-calendar/2016/nodejs
* http://qiita.com/advent-calendar/2016/php
* http://qiita.com/advent-calendar/2016/othlotech
* http://qiita.com/advent-calendar/2016/rust-lang
* http://qiita.com/advent-calendar/2016/xamarin2
* http://qiita.com/advent-calendar/2016/no-girlfriend
* http://qiita.com/advent-calendar/2016/csharp
* http://qiita.com/advent-calendar/2016/swift2
* http://qiita.com/advent-calendar/2016/enebular
* http://qiita.com/advent-calendar/2016/postgresql
* http://qiita.com/advent-calendar/2016/ruby
* http://qiita.com/advent-calendar/2016/dots_girls
* http://qiita.com/advent-calendar/2016/gcp
* http://qiita.com/advent-calendar/2016/nodered
* http://qiita.com/advent-calendar/2016/rxjava
* http://qiita.com/advent-calendar/2016/xamarin-student
* http://qiita.com/advent-calendar/2016/javaee
* http://qiita.com/advent-calendar/2016/linux
* http://qiita.com/advent-calendar/2016/hci
* http://qiita.com/advent-calendar/2016/nginx
* http://qiita.com/advent-calendar/2016/job
* http://qiita.com/advent-calendar/2016/ruby_on_rails
* http://qiita.com/advent-calendar/2016/shell-script
* http://qiita.com/advent-calendar/2016/crowdworks
* http://qiita.com/advent-calendar/2016/sansan
* http://qiita.com/advent-calendar/2016/rails-info
* http://qiita.com/advent-calendar/2016/java
* http://qiita.com/advent-calendar/2016/firebase
* http://qiita.com/advent-calendar/2016/android
* http://qiita.com/advent-calendar/2016/basicinc
* http://qiita.com/advent-calendar/2016/go
* http://qiita.com/advent-calendar/2016/vue
* http://qiita.com/advent-calendar/2016/kusoapp
* http://qiita.com/advent-calendar/2016/ms-iot
* http://qiita.com/advent-calendar/2016/riotjs
* http://qiita.com/advent-calendar/2016/ios
* http://qiita.com/advent-calendar/2016/perl-entrance
* http://qiita.com/advent-calendar/2016/xamarin
* http://qiita.com/advent-calendar/2016/speee
* http://qiita.com/advent-calendar/2016/livesense_3
* http://qiita.com/advent-calendar/2016/angular
* http://qiita.com/advent-calendar/2016/kotlin
* http://qiita.com/advent-calendar/2016/livesense_2
* http://qiita.com/advent-calendar/2016/milkcocoa
* http://qiita.com/advent-calendar/2016/unity
* http://qiita.com/advent-calendar/2016/livesense_1
* http://qiita.com/advent-calendar/2016/swift
* http://qiita.com/advent-calendar/2016/crawler
* http://qiita.com/advent-calendar/2016/django

## 調査に使ったソースコード

[Qiita Advent Calendar 2016 で削除されたカレンダーを調べてみた](http://qiita.com/tag1216/items/db0d684c34db6be8710d)
で紹介されてたので、「プログラミング関係の記事」として存在できるように上記の調査に使ったソースコードも置いておきます。
Groovyです。

### Advent Calendar 一覧を取得するもの

```groovy
@Grapes(
  @Grab(group='org.jsoup', module='jsoup', version='1.+')
)
import org.jsoup.*
import org.jsoup.nodes.*
import org.jsoup.select.*

def calendars = "http://qiita.com/advent-calendar/2016/calendars?page="

def urls = []
(1..25).each{
    Document doc = Jsoup.connect( calendars + it ).get()
    Elements links = doc.select('td.adventCalendarList_calendarTitle > a')
    links.each{ urls += it.attr("abs:href") }
}

def outfile = new File("/Application/advent-calendar.txt")
urls.each{
    outfile.append( it + "\n" )
}
```

### 立てた人自身のエントリーを調べるもの

```groovy
@Grapes(
  @Grab(group='org.jsoup', module='jsoup', version='1.+')
)
import org.jsoup.*
import org.jsoup.nodes.*
import org.jsoup.select.*

def infile = new File("/Application/advent-calendar.txt")
def urls = []
infile.eachLine{ urls += it }

def owners = [:]
def rand = new Random()
urls.each{ String url ->
    println url
    sleep 1000+rand.nextInt(1000)
    
    Document doc = Jsoup.connect( url ).get()
    def owner = doc.select('p.adventCalendarJumbotron_owner > a').attr("href")
    def days = doc.select('td.adventCalendarCalendar_day')
    def authors = [:]
    days.each{
        def day = it.select('p.adventCalendarCalendar_date').text()
        def author = it.select('div.adventCalendarCalendar_author > a').attr("href")
        authors += ["$day":"$author"]
    }
    owners += ["$url": authors.findAll{ it.value == owner } ]
}

def outfile = new File("/Application/advent-calendar-authors.txt")
outfile.write(owners.toString())

def counts = []
26.times{ counts << 0 }
println counts
owners.each{
    if(!it.value){ counts[0]++ }
    it.value.each{ counts[it.key as Integer]++ }
}
println counts
```