dates in SQLite

SQLite does not have a storage class set aside for storing dates and/or times. Instead, the built-in Date and Time Functions in SQLite are capable of storing dates and times as TEXT, REAL, or INTEGER values:

• TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS").
• REAL as Julian day numbers, the number of days since noon in Greenwich on November 24, 4714 B.C. according to the proleptic Gregorian calendar.
• INTEGER as Unix Time, the number of seconds since 1970-01-01 00:00:00 UTC.

Applications can choose to store dates and times in any of these formats and freely convert between formats using the built-in date and time functions.

• From Docs

• TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS").

• REAL as Julian day numbers, the number of days since noon in Greenwich on November 24, 4714 B.C. according to the proleptic Gregorian calendar.

• INTEGER as Unix Time, the number of seconds since 1970-01-01 00:00:00 UTC.