Days of the Week in 2004
2004 began on a Thursday and was a leap year of 366 days. Its doomsday was Sunday, which is the weekday shared by 4 April, 6 June, 8 August, 10 October and 12 December that year.
15 June 2004
Day 167 of 2004 · ISO week 25 of 2004
15 June 2004 was a Tuesday. That was 8,088 days ago, which is 22 years.
Work it out in your head
Every year has a doomsday: the weekday shared by 4/4, 6/6, 8/8, 10/10, 12/12, 5/9, 9/5, 7/11, 11/7 and the last day of February. Learn the year's doomsday and any date is a short sum from the nearest anchor.
| Doomsday for 2004 | Sunday |
|---|---|
| Nearest anchor | 6/6 |
| Step from the anchor | +9 days |
| Step, modulo 7 | 2 |
| Result | Tuesday |
| Year | Years from 2004 |
|---|---|
| 2010 | 6 |
| 2021 | 17 |
| 2027 | 23 |
| 2032 | 28 |
Every month of 2004
The weekday each month opened and closed on. Between the two, every date in that month is a short count away, and the tool above gives it exactly.
| Month | 1st was a | Last day was a | Days |
|---|---|---|---|
| January | Thursday | Saturday | 31 |
| February | Sunday | Sunday | 29 |
| March | Monday | Wednesday | 31 |
| April | Thursday | Friday | 30 |
| May | Saturday | Monday | 31 |
| June | Tuesday | Wednesday | 30 |
| July | Thursday | Saturday | 31 |
| August | Sunday | Tuesday | 31 |
| September | Wednesday | Thursday | 30 |
| October | Friday | Sunday | 31 |
| November | Monday | Tuesday | 30 |
| December | Wednesday | Friday | 31 |
2004 at a glance
| 1 January | Thursday |
|---|---|
| 31 December | Friday |
| Leap year | Yes, February had 29 days |
| Days in the year | 366 |
| ISO weeks | 53 |
| Doomsday | Sunday |
| Days since 1 January 2004 | 8,254 |
Using the doomsday for 2004
The doomsday for 2004 was Sunday. That single fact gives you ten dates for free: 4 April, 6 June, 8 August, 10 October and 12 December were all Sundays, and so were 9 May, 5 September, 11 July, 7 November and 29 February.
From any of those, count forwards or backwards to the date you want and take the remainder after dividing by seven. The working panel under the result does it for you on whatever date you enter, so you can check yourself while you learn the method.
Frequently asked questions
What day of the week was 1 January 2004?
A Thursday. 2004 was a leap year, so it ran to 366 days and ended on a Friday.
Was 2004 a leap year?
Yes. 2004 divides by four and is not a century year, so February had 29 days.
How old is someone born in 2004?
They turn 22 during 2026, or are 21 until their birthday. For an exact figure to the day, use the age calculator with the full date of birth.