A date in every calendar
January 1, 2000
Saturday
The calendar rolled to 2000 — the Y2K moment the world had spent years preparing for.
January 1, 2000 across 14 calendars
| Gregorian Solar | January 1, 2000 |
| Hebrew Lunisolar | 23 Tevet 5760 |
| Islamic (Umm al-Qura) Lunar | Ramadan 24, 1420 AH |
| Islamic (tabular civil) Lunar | Ramadan 24, 1420 AH |
| Persian (Solar Hijri) Solar | Dey 11, 1378 AP |
| Indian National Solar | Pausa 11, 1921 Śaka |
| Chinese Lunisolar | Eleventh Month 25, 1999(ji-mao) |
| Korean (Dangi) Lunisolar | Eleventh Month 25, 1999(ji-mao) |
| Japanese (regnal) Solar | January 1, 12 Heisei |
| Buddhist (Thai) Solar | January 1, 2543 BE |
| Republic of China (Minguo) Solar | January 1, 89 Minguo |
| Coptic Solar | Kiahk 22, 1716 AM |
| Ethiopian Solar | Tahsas 22, 1992 AM |
| Ethiopian (Amete Alem) Solar | Tahsas 22, 7492 AA |
Conversions use the proleptic Gregorian calendar as the pivot. All systems render the same physical day — a Saturday.