Tool to compute the day number in a year. Calculation of the nth day of the year or know the number of days since the first January in the Gregorian Calendar (N-th day).

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Calculation of the date for the nth day of the year

Tool to compute the day number in a year. Calculation of the nth day of the year or know the number of days since the first January in the Gregorian Calendar (N-th day).

Answers to Questions

How to calculate the nth day of the year?

The day of year calculator uses the number of days between the date of 1st january and the desired day. It takes into account the number of days in each month and can be set for a leap year.

Example: The 1st January 2021 is the day 1

Example: The 31th december is the 365th (for non-leap year)

50th day

19/02

100th day

10/04

123th day

03/05

150th day

30/05

183th day (365/2)

02/07

200th day

19/07

250th day

07/09

256th day

13/09

300th day

27/10

350th day

16/12

The calculation to be made is the date difference between the first day of the year and the current day.

What is the middle day of the year?

A year has 365 or 366 days, the middle day of a year is the 183rd or July 2nd.

What is the calendar number?

A calendar number is the (rare) name given to the day number in a year.

How to convert an nth day to date in Excel?

Type the formula =DATE(YEAR(TODAY()),1,A1) by replacing N with the day number to obtain the corresponding date in the current year. Replace YEAR(TODAY()) with any year value if needed.

Source code

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