🗓
Day of Week
Thursday
Day 4 of 7 (ISO)
📆
Month
December
12th month · 31 days
🔢
Day of Year
365
of 365 days in 2026
📊
Week Number
Week 53
ISO 8601 · 2026
🌙
Moon Phase
–
Calculating...
♑
Zodiac Sign
Capricorn
Earth · Saturn
🐴
Chinese Zodiac
Horse
Year of the Wood Horse
🌍
Quarter
Q4 2026
Days left in year: 0
🌐 This Date in Other Calendar Systems
GregorianDecember 31, 2026
Hijri (Islamic)20 Rajab 1448 AH
Persian (Solar Hijri)31 Azar 1405 SH
ISO 86012026-12-31
Unix Timestamp1798675200
Julian Day2461406
📋 Date Facts
| Full date | Thursday, December 31, 2026 |
| US short date | 12/31/2026 |
| European date | 31/12/2026 |
| Day of year | 365 of 365 |
| Week of year (ISO) | Week 53 |
| Leap year? | No — 2026 has 365 days |
| Days in month | 31 days (December) |
| Days remaining in year | 0 days |
🌅 Sun & Astronomy
| Season (N. Hemisphere) | Winter ❄️ |
| Season (S. Hemisphere) | Summer ☀️ |
| Zodiac sign | ♑ Capricorn |
| Chinese zodiac | 🐴 Horse (Wood) |
| Moon phase (approx.) | Calculating... |
| Days since year start | 365 |
| Days until year end | 0 |
| Quarter | Q4 |
📜 December 31 in History
1879
Thomas Edison demonstrates incandescent lightbulb publicly
1999
Y2K fears at midnight: no catastrophe occurs
🎂 Age Calculator — As of December 31, 2026
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