Author: Written by Thomas Lockhart (<firstname.lastname@example.org>) on 1998-10-22. Updated 2000-03-31.
The PostgreSQL Global Development Group provides the PostgreSQL software code tree as a public service, without warranty and without liability for its behavior or performance. However, at the time of writing:
The author of this statement, a volunteer on the PostgreSQL support team since November, 1996, is not aware of any problems in the PostgreSQL code base related to time transitions around Jan 1, 2000 (Y2K).
The author of this statement is not aware of any reports of Y2K problems uncovered in regression testing or in other field use of recent or current versions of PostgreSQL. We might have expected to hear about problems if they existed, given the installed base and the active participation of users on the support mailing lists.
To the best of the author's knowledge, the assumptions PostgreSQL makes about dates specified with a two-digit year are documented in the current User's Guide in the chapter on data types. For two-digit years, the significant transition year is 1970, not 2000; e.g. 70-01-01 is interpreted as 1970-01-01, whereas 69-01-01 is interpreted as 2069-01-01.
Any Y2K problems in the underlying OS related to obtaining the "current time" may propagate into apparent Y2K problems in PostgreSQL.