1. árþúsundið

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

Aldir og áratugir 2. árþúsundsins

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