Today, Sunday, October 25, 2026, is day 298 of 365, and 297 days of 2026 have passed before it. Pick another date for its day number and ISO week, or enter a day number to find its date.
297days
Full days of 2026 before today, Sunday, October 25, 2026. Counting today: 298 days.
Day of the year
298th
Share of the year passed
81.4%
ISO-8601 week
Week 43
Days left after this day
67
Time zone: your device's time zone
Which date is day number…
Day 100 of 2026 is Friday, April 10, 2026.
ISO week numbers in 2026
2026 has 53 ISO weeks. Week 1 began on Monday, December 29, 2025, and the last week ends on Sunday, January 3, 2027. Each square is one Monday-to-Sunday week.
Point at or tap a week to see its Monday and Sunday dates. With a keyboard, focus the strip and use the arrow keys (one week left or right, one row up or down) or Home and End.
What day of the year is it? Day number vs. days passed
The day number counts the date itself, while days passed counts only the full days before it, so the two always differ by 1. Today is day 298, with 297 days behind it. On January 1, the day number is 1 and no days have passed.
Date
Day of the year (common year)
Days passed before it
Day of the year (leap year)
January 1
1
0
1
February 1
32
31
32
March 1
60
59
61
July 4
185
184
186
October 1
274
273
275
December 31
365
364
366
Day numbers restart every January 1. For a span that crosses it, the days since calculator counts back from any past date, and days until a date counts forward.
Finding the day number of any date
Add the days in every full month before the date, then the day of the month. October 20 in a common year is 273 + 20 = day 293. In a leap year, February 29 is day 60, so add 1 for any date from March 1 onward. The leap year guide covers which years get the extra day.
Month
Days before the 1st (common year)
Days before the 1st (leap year)
January
0
0
February
31
31
March
59
60
April
90
91
May
120
121
June
151
152
July
181
182
August
212
213
September
243
244
October
273
274
November
304
305
December
334
335
The days passed before a date equal its month’s figure plus the day of the month, minus 1. The table also works backward: day 256 is 13 days past September’s 243, so it is September 13 in a common year and September 12 in a leap year. To count forward from today rather than from January 1, find the date 100 days from today.
What week of the year is it?
Today falls in ISO week 43. Under ISO 8601, weeks run Monday to Sunday and week 1 is the week that contains the year’s first Thursday, which is also the week that contains January 4. January 1 to 3 can therefore belong to the last week of the previous year, and December 29 to 31 to week 1 of the next.
An ISO year has 53 weeks when it starts on a Thursday, or when it is a leap year that starts on a Wednesday. Every other year has 52. Some calendars start weeks on Sunday and call the week with January 1 week 1, so their numbers can differ from ISO’s by one. Check which system a payroll or school calendar uses.
Share of the year passed
81.4% of 2026 was over at the start of today: the days passed divided by the days in the year, times 100.
End of
Days passed (common year)
Share passed
Days passed (leap year)
Share passed
March
90
24.7%
91
24.9%
June
181
49.6%
182
49.7%
September
273
74.8%
274
74.9%
December
365
100%
366
100%
Each quarter mark lands just short of 25%, 50% and 75% because calendar quarters are unequal: January to March has 90 or 91 days, while October to December has 92. The days left in the year page counts the rest in days, weeks and business days.
Frequently asked questions
What day of the year is Christmas?
Day 359, or day 360 in a leap year, because February 29 moves every later date up by one.
What is the 100th day of the year?
April 10, or April 9 in a leap year. Enter 100 in the day-number lookup to see the weekday for any year.
Is the day of the year the same as the Julian date?
No, not in astronomy. The day number is often called the ordinal date or, informally, the Julian date, but astronomers use Julian Date for a continuous count of days across years.