Template:Signing/doc

Usage
Signing is used to unobtrusively add a forgotten user signature in a talk page comment.

The times passed into this template should always be in UTC. The time stamps in the edit history list for any talk page appear in UTC, unless you defined a local time in your preferences. In that case, adjust the manually, using the difference you designated between the server UTC time and local time. Do not use other time zones, in doubt it's preferable to leave the second parameter empty.