Year seasons

These are those years that Happy Tree Friends has had episodes, videos, images and games being made. These years are like seasons.
== Seasons ==
Season Number	Season Number	Period 	Period
Season Number	Season Number	Start of period	End of period
 	1 	May 15, 1999 	December 31, 1999
 	2 	January 1, 2000	December 31, 2000
 	3 	January 1, 2001	December 31, 2001
 	4 	January 1, 2002	December 31, 2002
 	5 	January 1, 2003	December 31, 2003
 	6 	January 1, 2004	December 31, 2004
 	7 	January 1, 2005	December 31, 2005
 	8 	January 1, 2006	December 31, 2006
 	9 	January 1, 2007	December 31, 2007
 	10 	January 1, 2008	December 31, 2008
 	11 	January 1, 2009	December 31, 2009
 	12 	January 1, 2010	December 31, 2010
 	13 	January 1, 2011	December 31, 2011
 	14 	January 1, 2012	December 31, 2012
 	15 	January 1, 2013	December 31, 2013
 	16 	January 1, 2014	December 31, 2014
 	17 	January 1, 2015	December 31, 2015
 	18 	January 1, 2016	December 31, 2016
 	19 	January 1, 2017	December 31, 2017
 	20 	January 1, 2018	December 31, 2018
 	21 	January 1, 2019	December 31, 2019
 	22 	January 1, 2020	December 31, 2020
 	23 	January 1, 2021	Ongoing
== Images ==
=== In original formats ===
Season 1.png|Season 1
Season 2.png|Season 2
Season 3.png|Season 3
Season 4.png|Season 4
Season 5.png|Season 5
Season 6.png|Season 6
Season 7.png|Season 7
Season 8.png|Season 8
Season 9.png|Season 9
Season 10.png|Season 10
Season 11.png|Season 11
Season 12.png|Season 12
Season 13.png|Season 13
Season 14.png|Season 14
Season 15.png|Season 15
Season 16.png|Season 16
Season 17.png|Season 17
Season 18.png|Season 18
Season 19.png|Season 19
Season 20.png|Season 20
Season 21.png|Season 21
Season 22.png|Season 22
Season 23.png|Season 23
=== 16:9 format (the original 4:3 format images include black bars on the sides) ===
Season 1 (Black bars).png|Season 1
Season 2 (Black bars).png|Season 2
Season 3 (Black bars).png|Season 3
Season 4 (Black bars).png|Season 4
Season 5 (Black bars).png|Season 5
Season 6 (Black bars).png|Season 6
Season 7 (Black bars).png|Season 7
Season 8 (Black bars).png|Season 8
Season 9 (Black bars).png|Season 9
Season 10 (Black bars).png|Season 10
Season 11.png|Season 11
Season 12.png|Season 12
Season 13.png|Season 13
Season 14.png|Season 14
Season 15.png|Season 15
Season 16.png|Season 16
Season 17.png|Season 17
Season 18.png|Season 18
Season 19.png|Season 19
Season 20.png|Season 20
Season 21.png|Season 21
Season 22.png|Season 22
Season 23.png|Season 23
<onlyinclude>
Category:Series
Category:Happy Tree Friends
Category:Year seasons