Days of the Week in 2009
2009 began on a Thursday and was a common year of 365 days. Its doomsday was Saturday, which is the weekday shared by 4 April, 6 June, 8 August, 10 October and 12 December that year.
15 June 2009
Day 166 of 2009 · ISO week 25 of 2009
15 June 2009 was a Monday. That was 6,262 days ago, which is 17 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 2009 | Saturday |
|---|---|
| Nearest anchor | 6/6 |
| Step from the anchor | +9 days |
| Step, modulo 7 | 2 |
| Result | Monday |
| Year | Years from 2009 |
|---|---|
| 2015 | 6 |
| 2020 | 11 |
| 2026 | 17 |
| 2037 | 28 |
Every month of 2009
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 | Saturday | 28 |
| March | Sunday | Tuesday | 31 |
| April | Wednesday | Thursday | 30 |
| May | Friday | Sunday | 31 |
| June | Monday | Tuesday | 30 |
| July | Wednesday | Friday | 31 |
| August | Saturday | Monday | 31 |
| September | Tuesday | Wednesday | 30 |
| October | Thursday | Saturday | 31 |
| November | Sunday | Monday | 30 |
| December | Tuesday | Thursday | 31 |
2009 at a glance
| 1 January | Thursday |
|---|---|
| 31 December | Thursday |
| Leap year | No, February had 28 days |
| Days in the year | 365 |
| ISO weeks | 53 |
| Doomsday | Saturday |
| Days since 1 January 2009 | 6,427 |
Using the doomsday for 2009
The doomsday for 2009 was Saturday. That single fact gives you ten dates for free: 4 April, 6 June, 8 August, 10 October and 12 December were all Saturdays, and so were 9 May, 5 September, 11 July, 7 November and 28 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 2009?
A Thursday. 2009 was a common year, so it ran to 365 days and ended on a Thursday.
Was 2009 a leap year?
No. 2009 does not divide by four, so February had 28 days.
How old is someone born in 2009?
They turn 17 during 2026, or are 16 until their birthday. For an exact figure to the day, use the age calculator with the full date of birth.