1. árþúsundið

1. árþúsundið er í gregoríska tímatalinu tímabilið sem hófst við upphaf ársins 1 og stóð til loka ársins 1000. 

Aldir og áratugir
 1. öldin  1–10  11–20  21–30  31–40  41–50  51–60  61–70  71–80  81–90  91–100 2. öldin  101–110  111–120  121–130  131–140  141–150  151–160  161–170  171–180  181–190  191–200 3. öldin  201–210  211–220  221–230  231–240  241–250  251–260  261–270  271–280  281–290  291–300 4. öldin  301–310  311–320  321–330  331–340  341–350  351–360  361–370  371–380  381–390  391–400 5. öldin  401–410  411–420  421–430  431–440  441–450  451–460  461–470  471–480  481–490  491–500 6. öldin  501–510  511–520  521–530  531–540  541–550  551–560  561–570  571–580  581–590  591–600 7. öldin  601–610  611–620  621–630  631–640  641–650  651–660  661–670  671–680  681–690  691–700 8. öldin  701–710  711–720  721–730  731–740  741–750  751–760  761–770  771–780  781–790  791–800 9. öldin  801–810  811–820  821–830  831–840  841–850  851–860  861–870  871–880  881–890  891–900 10. öldin  901–910  911–920  921–930  931–940  941–950  951–960  961–970  971–980  981–990  991–1000

Flokkur:1. árþúsundið