What Day of the Week Was June 6, 1944?
June 6, 1944 (D-Day) was a Tuesday. On June 6, 1944, D-Day, Allied forces landed on the beaches of Normandy in northern France.
June 6, 1944 is a Tuesday
- Day of the year:
- day 158 of 366, 208 days left in the year
- Week number:
- ISO week 23 of 1944 · US week 24
- Weekday number:
- 3 in the US (Sunday = 1) · 2 in ISO 8601 (Monday = 1)
Another date? Change the date above, or open the day of the week calculator for today's weekday and any other date.
June 6, 1944 in numbers
| June 6, 1944 | |
|---|---|
| Day of the week | Tuesday |
| Weekday number | 3 in the US (Sunday = 1), 2 in ISO 8601 (Monday = 1) |
| Day of the year | 158 of 366, 208 days left |
| ISO week | Week 23 of 1944 |
| US week | Week 24 |
| Leap year | Yes, 1944 had 366 days |
| Julian Day Number | 2431248 |
June 1944 calendar
The whole month, with June 6, 1944 highlighted. The column on the left is the US week number.
| Wk | Su | Mo | Tu | We | Th | Fr | Sa |
|---|---|---|---|---|---|---|---|
| 23 | 1 | 2 | 3 | ||||
| 24 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 25 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 26 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 27 | 25 | 26 | 27 | 28 | 29 | 30 |
The years 1916, 1972 have the same calendar as 1944: they start on the same weekday and are leap years too, so June 6 is a Tuesday in each of them.
How to work out that June 6, 1944 was a Tuesday
Zeller's congruence gives the weekday of any Gregorian date with a few sums:
- Day q = 6; month m = 6.
- Year of the century K = 44; century J = 19.
- q + ⌊13 × (m + 1) ÷ 5⌋ + K + ⌊K ÷ 4⌋ + ⌊J ÷ 4⌋ + 5 × J = 6 + 18 + 44 + 11 + 4 + 95 = 178.
- 178 divided by 7 leaves 3, and 3 stands for Tuesday (0 is Saturday, 1 Sunday, up to 6 for Friday).
DateMath's calculator gets the same answer another way, by counting the days from a fixed date and taking the remainder after whole weeks.
What day of the week is June 6 in the coming years?
| Date | Weekday | Since 1944 |
|---|---|---|
| June 6, 2027 | Sunday | 83 years |
| June 6, 2028 | Tuesday | 84 years |
| June 6, 2029 | Wednesday | 85 years |
| June 6, 2030 | Thursday | 86 years |
| June 6, 2031 | Friday | 87 years |
| June 6, 2032 | Sunday | 88 years |
| June 6, 2033 | Monday | 89 years |
| June 6, 2034 | Tuesday | 90 years |
| June 6, 2035 | Wednesday | 91 years |
| June 6, 2036 | Friday | 92 years |
How DateMath finds the day of the week
DateMath counts the days from a fixed date to yours in the Gregorian calendar and takes the remainder after whole weeks, so every date in the years 1 to 9999 gets its weekday, leap days included. The same date is then numbered both ways: in the US, Sunday is day 1 of the week; in ISO 8601, Monday is day 1 and Sunday day 7. Today and tomorrow come from your device's date.
- The Gregorian calendar. DateMath treats every date as a Gregorian date, with its leap-year rule: a year divisible by 4 is a leap year, except century years not divisible by 400, so 2000 had a February 29 and 2100 will not. Source: Gregorian calendar.
- ISO 8601 week dates. DateMath numbers weeks by ISO 8601: weeks start on Monday, week 1 is the week with the year's first Thursday, and a year has 52 or 53 weeks. Source: ISO 8601.
DateMath's date math is tested against more than 100 cases worked out by hand. Every worked example and table on the site is computed with the same code the calculators run, so a page and its calculator can't disagree.
Frequently asked questions
- What day of the week was June 6, 1944 (D-Day)?
- June 6, 1944 was a Tuesday. It was day 158 of 1944, in ISO week 23 and US week 24.
- What day of the week was D-Day?
- A Tuesday: the landings in Normandy began in the early hours of June 6, 1944. The invasion had been planned for June 5, a Monday, and was put back by a day because of the weather.
- What day of the week is June 6 in 2027?
- June 6, 2027 is a Sunday. A date moves one weekday later each year, and two after a February 29.
- Was 1944 a leap year?
- Yes. 1944 had 366 days, with a February 29, so June 6, 1944 was day 158 of 366.