I'm getting the following this Unix time from a REST API: Unix Time: 1387243991 Which is the following GMT: Tue, 17 Dec 2013 01:33:11 GMT And localized: 12/16/2013 22:33:11 GMT-3 So far, so good. If I parse it with ZTimestamp it parses properly (kudos svc): (ZTimestamp fromUnixTime: 1387243991) "prints ->" 2013-12-17T01:33:11Z. But if I parse it with TimeStamp it gives me totally weird output: (TimeStamp fromUnixTime: 1387243991) "prints ->" 16 December 2013 12:0-26:0-49 am Until here it seems to be a matter of printing, the underlying seconds remain untouched. But then when mapped to a timestamp column without timezone with GLORP (PostgreSQL) I'm getting this stored in the database: '2013-12-16 17:33:11' Which once read again by GLORP get's converted to: 16 December 2013 12:0-26:0-49 am (Which asZTimestamp is '2013-12-16T09:33:11Z'). Any help here? If it was my choice, I would only use ZTimestamp, and display localized every time I need. But I don't know if there is a way to map a ZTimestamp to a TZ column in GLORP. Anybody did the "converter" already? Regards, Esteban A. Maringolo