Date and Time Types and Functions

1. Overview

Perform operations on a date and time input values and return string, numeric, or date and time values.

The date and time date type and functions covered in this section are:

• ​Date and Time Data Types​

• Date and Time Function Categories

  • ​Return System Date and Time Values ​

  • ​Return Date and Time Parts​

  • ​Return Date and Time Values from their Parts​

  • ​Return Date and Time Difference Values​

  • ​Modify Date and Time Values ​

  • ​Validate Date and Time Values​

Date and Time Data Types

Data type	Format	Range	Accuracy	Storage size (bytes)	User-defined fractional second precision	Time zone offset
time	hh:mm:ss[.nnnnnnn]	00:00:00.0000000 through 23:59:59.9999999	100 nanoseconds	3 to 5	Yes	No
date	YYYY-MM-DD	0001-01-01 through 9999-12-31	1 day	3	No	No
smalldatetime	YYYY-MM-DD hh:mm:ss	1900-01-01 through 2079-06-06	1 minute	4	No	No
datetime	YYYY-MM-DD hh:mm:ss[.nnn]	1753-01-01 through 9999-12-31	0.00333 second	8	No	No
datetime2	YYYY-MM-DD hh:mm:ss[.nnnnnnn]	0001-01-01 00:00:00.0000000 through 9999-12-31 23:59:59.9999999	100 nanoseconds	6 to 8	Yes	No
datetimeoffset	YYYY-MM-DD hh:mm:ss[.nnnnnnn] [+|-]hh:mm	0001-01-01 00:00:00.0000000 through 9999-12-31 23:59:59.9999999 (in UTC)	100 nanoseconds	8 to 10	Yes	​

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