U.S. observance
How Many Days Until National Defense Transportation Day 2027?
Today: · Eastern Time (America/New_York)
Calendar days until National Defense Transportation Day
209 days until National Defense Transportation Day
National Defense Transportation Day is on Friday, May 21, 2027.
Live countdown to midnight on May 21, 2027
208 days, 17 hours, 24 minutes, 49 seconds remaining
Eastern Time (America/New_York). Countdown days are 24 hours; the calendar-day count above uses local dates.
- Calendar days (signed)
- 209
- Full weeks + days
- 29 weeks + 6 days
- Calendar months + days
- 6 months + 27 days
- Years, months, days
- 0 years, 6 months, 27 days
- Weekdays counted
- 150
- Weekend days counted
- 59
- U.S. business days
- 144
- Observed holiday dates skipped
- 6
What is National Defense Transportation Day?
National Defense Transportation Day, the third Friday in May, recognizes the people and industries that move goods and troops in support of national defense, from trucking and rail to shipping and aviation.
History of National Defense Transportation Day
Congress established the day in 1957, as the Interstate Highway System was being built partly for defense purposes. The President usually proclaims it together with National Transportation Week.
National Defense Transportation Day today
Transportation agencies, the military and industry groups use the week to highlight transportation careers and infrastructure, and the President issues a proclamation.
Date details
- Category
- U.S. observance
- How the date is set
- Set by a yearly rule
- Country / region
- United States
- Actual event date
Third Friday in May; 36 U.S.C. 120. Source: U.S. Code (GovInfo)
Event date facts
- Weekday
- Friday
- ISO week / year
- 20 / 2027
- Day of year
- 141
- Quarter
- 2
- Days left in year
- 224
- Leap year
- No
May 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| Target | ||||||
Event dates by year
| Rule year | Actual date | Observed federal closure | Certainty |
|---|---|---|---|
| 2025 | Friday, May 16, 2025 | — | Set by a yearly rule |
| 2026 | Friday, May 15, 2026 | — | Set by a yearly rule |
| 2027 | Friday, May 21, 2027 | — | Set by a yearly rule |
| 2028 | Friday, May 19, 2028 | — | Set by a yearly rule |
| 2029 | Friday, May 18, 2029 | — | Set by a yearly rule |
Quick answers
- What day of the week is May 21, 2027?
- May 21, 2027 is a Friday.
- Is National Defense Transportation Day a federal holiday?
- No. National Defense Transportation Day is not a U.S. federal holiday, so federal offices and most businesses stay open.
- What week of the year is May 21, 2027?
- May 21, 2027 is in ISO week 20 of 2027 and is day 141 of the year.
How the National Defense Transportation Day date is calculated
- May 1, 2027 is a Saturday, so the first Friday is May 7 and the third is May 21. That makes National Defense Transportation Day Friday, May 21, 2027.
- The countdown counts calendar days from today to May 21, 2027. 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 May 21, 2027 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 6:35 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.