OneTaskBy Tim King · Updated
Days Left in the Year
Days Remaining, Day of the Year and Percentage of the Year Gone
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How the Days Left in the Year works
See how many days left in the year there are from today or any date you pick. The result gives the day of the year, how much of the year has gone as a percentage, and the days remaining as weeks and days, which is useful for year-end targets, budgets and goals.
How the days left in the year are counted
The formula is the length of the year minus the day of the year. A common year has 365 days and a leap year 366. The day of the year counts 1 January as day 1, so on 31 December the count reaches the full length and no days are left.
Worked examples
For example, 1 October 2027 is day 274 of a 365-day year, which leaves 91 days, or 13 weeks exactly, and the year is 75.1% complete. As a second example, 1 October 2028 is day 275, because 2028 is a leap year with a 29 February, but it still leaves 91 days, since the leap year is also one day longer.
What counts as left
The date you enter is treated as used, so the count covers the days after it up to and including 31 December. That matches how many days you can still plan for, and it means the count on New Year's Eve is zero.
How many days are left at each point of the year?
The table gives the day of the year and days left for the 1st and 15th of every month in 2027, a common year. In a leap year, add one to the day of the year for any date after February; the days left stay the same.
Day of the year and days left on the 1st and 15th of each month in 2027
| Date in 2027 | Day of the year | Days left |
|---|---|---|
| 1 January | 1 | 364 |
| 15 January | 15 | 350 |
| 1 February | 32 | 333 |
| 15 February | 46 | 319 |
| 1 March | 60 | 305 |
| 15 March | 74 | 291 |
| 1 April | 91 | 274 |
| 15 April | 105 | 260 |
| 1 May | 121 | 244 |
| 15 May | 135 | 230 |
| 1 June | 152 | 213 |
| 15 June | 166 | 199 |
| 1 July | 182 | 183 |
| 15 July | 196 | 169 |
| 1 August | 213 | 152 |
| 15 August | 227 | 138 |
| 1 September | 244 | 121 |
| 15 September | 258 | 107 |
| 1 October | 274 | 91 |
| 15 October | 288 | 77 |
| 1 November | 305 | 60 |
| 15 November | 319 | 46 |
| 1 December | 335 | 30 |
| 15 December | 349 | 16 |
FAQ
What day of the year is it today?
Leave the date field empty and the calculator shows today's day number, counted from 1 January as day 1. Day numbers, sometimes called Julian dates in manufacturing and food labelling, are used on batch codes and in logistics.
How many weeks are left in the year?
Divide the days left by seven. The calculator shows the answer as whole weeks and leftover days, so 92 days reads as 13 weeks and 1 day. For working weeks, remember that public holidays around Christmas often shorten the last one or two.
Why is it 75% through the year in October, not September?
Because the percentage counts days, and the first three quarters of the year hold 273 days in a common year. The last day of September is day 273 of 365, which is 74.8%, so the 75% mark falls on 1 October.
See also: all Calendars tools, Countdowns, Durations, Work and Contracts, Date Formats, Time Zones and Travel, Sun and Daylight.
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