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MySQL 5.7 Reference Manual  /  ...  /  The YEAR Type

11.2.4 The YEAR Type

The YEAR type is a 1-byte type used to represent year values. It can be declared as YEAR with an implicit display width of 4 characters, or equivalently as YEAR(4) with an explicit display width.


The 2-digit YEAR(2) data type is deprecated and support for it is removed in MySQL 5.7.5. To convert 2-digit YEAR(2) columns to 4-digit YEAR columns, see Section 11.2.5, “2-Digit YEAR(2) Limitations and Migrating to 4-Digit YEAR”.

MySQL displays YEAR values in YYYY format, with a range of 1901 to 2155, and 0000.

YEAR accepts input values in a variety of formats:

  • As 4-digit strings in the range '1901' to '2155'.

  • As 4-digit numbers in the range 1901 to 2155.

  • As 1- or 2-digit strings in the range '0' to '99'. MySQL converts values in the ranges '0' to '69' and '70' to '99' to YEAR values in the ranges 2000 to 2069 and 1970 to 1999.

  • As 1- or 2-digit numbers in the range 0 to 99. MySQL converts values in the ranges 1 to 69 and 70 to 99 to YEAR values in the ranges 2001 to 2069 and 1970 to 1999.

    The result of inserting a numeric 0 has a display value of 0000 and an internal value of 0000. To insert zero and have it be interpreted as 2000, specify it as a string '0' or '00'.

  • As the result of functions that return a value that is acceptable in YEAR context, such as NOW().

If strict SQL mode is not enabled, MySQL converts invalid YEAR values to 0000. In strict SQL mode, attempting to insert an invalid YEAR value produces an error.

See also Section 11.2.10, “2-Digit Years in Dates”.