U.S. observance
How Many Days Until U.S. Space Force Birthday 2026?
Today: · Eastern Time (America/New_York)
Calendar days until U.S. Space Force Birthday
57 days until U.S. Space Force Birthday
U.S. Space Force Birthday is on Sunday, December 20, 2026.
Live countdown to midnight on December 20, 2026
56 days, 18 hours, 31 minutes, 16 seconds remaining
Eastern Time (America/New_York). Countdown days are 24 hours; the calendar-day count above uses local dates.
- Calendar days (signed)
- 57
- Full weeks + days
- 8 weeks + 1 day
- Calendar months + days
- 1 month + 26 days
- Years, months, days
- 0 years, 1 month, 26 days
- Weekdays counted
- 40
- Weekend days counted
- 17
- U.S. business days
- 38
- Observed holiday dates skipped
- 2
What is U.S. Space Force Birthday?
The U.S. Space Force Birthday, December 20, marks the creation of the newest branch of the U.S. armed forces, responsible for military operations in space.
History of U.S. Space Force Birthday
The Space Force was established on December 20, 2019, when President Donald Trump signed the National Defense Authorization Act, the first new military service since the Air Force in 1947. Its members are called Guardians.
U.S. Space Force Birthday today
Guardians mark the anniversary with ceremonies and birthday events at bases such as Peterson and Vandenberg, and leaders issue anniversary messages.
Date details
- Category
- U.S. observance
- How the date is set
- Same date every year
- Country / region
- United States
- Actual event date
Annual founding anniversary under the current observance. Source: U.S. Space Force
Event date facts
- Weekday
- Sunday
- ISO week / year
- 51 / 2026
- Day of year
- 354
- Quarter
- 4
- Days left in year
- 11
- Leap year
- No
December 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| Target | ||||||
Event dates by year
| Rule year | Actual date | Observed federal closure | Certainty |
|---|---|---|---|
| 2025 | Saturday, December 20, 2025 | — | Same date every year |
| 2026 | Sunday, December 20, 2026 | — | Same date every year |
| 2027 | Monday, December 20, 2027 | — | Same date every year |
| 2028 | Wednesday, December 20, 2028 | — | Same date every year |
| 2029 | Thursday, December 20, 2029 | — | Same date every year |
Quick answers
- What day of the week is December 20, 2026?
- December 20, 2026 is a Sunday.
- Is U.S. Space Force Birthday a federal holiday?
- No. U.S. Space Force Birthday is not a U.S. federal holiday, so federal offices and most businesses stay open.
- What week of the year is December 20, 2026?
- December 20, 2026 is in ISO week 51 of 2026 and is day 354 of the year.
How the U.S. Space Force Birthday date is calculated
- U.S. Space Force Birthday is on December 20 every year. In 2026 that is a Sunday.
- The countdown counts calendar days from today to December 20, 2026. The start date is excluded and the end date is included. Dates use Eastern Time (America/New_York).
- The live countdown runs to midnight at the start of December 20, 2026 in Eastern Time (America/New_York). A countdown day is 24 hours, so a daylight-saving change can make it differ from the calendar-day count by an hour.
- Calculated at 6:28 AM on October 24, 2026.
- U.S. business days exclude Saturday, Sunday and observed nationwide federal closures; individual employer and state schedules are not included.