April 13–19, 2015
MonTueWedThuFriSatSun
Week 1 contains the first Thursday of the year.ISO guide →Date → week number
April 15, 2015: What week number?
Wednesday, April 15, 2015ISO Week 162015-W16
ISO Week 16 runs from April 13, 2015 to April 19, 2015.
ISO vs US-style week numbers
The same date can have different week numbers
ISO weeks start on Monday. The simplified US-style system starts on Sunday and counts the week containing January 1 as Week 1.
April 12–18, 2015
SunMonTueWedThuFriSat
Week 1 contains January 1.US-style guide →ISO weekWeek 16
US-style weekWeek 16
WeekdayWednesday
QuarterQ2
Day of year105 / 365
ISO weekday3 / 7
April 2015
Date context
Wednesday, April 15, 2015 is day 105 of 2015 and belongs to ISO Week 16.
The entire ISO Week 16 falls within April.
Distance from today
How long ago was April 15, 2015?
Days4192
Full weeks598
Remaining days6
April 15, 2015 is 4192 days before today, equal to 598 full weeks and 6 days.