Le log file contains information about the different sync proceeded during the last session of pwcald. If you restart pwcald, the log file is cleared.
This is a typical example of a pwcald session:
24/08/2001 11:18:52 : P*Wcal start 24/08/2001 11:19:57 : User Joel connected 24/08/2001 11:20:01 : Palm(35) -> Wcal(295) : added 24/08/2001 11:20:02 : Wcal(294) -> Palm(36) : added 24/08/2001 11:20:03 : Wcal(290) -> Palm(1) : modified 24/08/2001 11:20:03 : User Joel disconnected 24/08/2001 11:21:10 : User Tux connected 24/08/2001 11:21:10 : Palm(39) -> Wcal(296) : added 24/08/2001 11:21:11 : Palm(24) -> Wcal(297) : added 24/08/2001 11:21:12 : User Tux disconnected 24/08/2001 11:23:23 : User Joel connected 24/08/2001 11:23:24 : Wcal(295) -> Palm(35) : deleted 24/08/2001 11:23:24 : User Joel disconnected 24/08/2001 11:23:53 : P*Wcal stop