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MONTH function ​

Note: This draft page is under construction 🚧

Overview ​

MONTH is a function of the Date and Time category that extracts the month from a valid date serial number, returning a number in the range [1, 12].

Usage ​

Syntax ​

MONTH(date) => month

Argument descriptions ​

  • date (number, required). The date for which the month is to be calculated, expressed as a serial number in the range [1, 2958466). The value 1 corresponds to the date 1899-12-31, while 2958465 corresponds to 9999-12-31.

Additional guidance ​

If the supplied date argument has a fractional part, MONTH uses its floor value.

Returned value ​

MONTH returns an integer number in the range [1, 12], that is the month according to the Gregorian calendar. The value 1 corresponds to January, 2 corresponds to February and so on.

Error conditions ​

  • In common with many other IronCalc functions, MONTH propagates errors that are found in its argument.
  • If no argument, or more than one argument, is supplied, then MONTH returns the #ERROR! error.
  • If the value of the date argument is not (or cannot be converted to) a number, then MONTH returns the #VALUE! error.
  • For some argument values, MONTH may return the #DIV/0! error.
  • If date is less than 1, or greater than or equal to 2,958,466, then MONTH returns the #NUM! error.
  • At present, MONTH does not accept a string representation of a date literal as an argument. For example, the formula =MONTH("2024-12-31") returns the #VALUE! error.
  • For more information about the different types of errors that you may encounter when using IronCalc functions, visit our Error Types page.

Details ​

IronCalc utilizes Rust's chrono crate to implement the MONTH function.

Examples ​

See some examples in IronCalc.