A simple method to parse a PostgreSQL time stamp in Safari.

parseTimestamp.js

// Returns the timestamp as a Date object (from the host's timezone),
// in GMT. If timestamp is *not* GMT, pass in a truthy value for isLocal.
function parseTimestamp(timestamp, isLocal) {
    var z = isLocal ? 0 : new Date().getTimezoneOffset() / 60;
    var t = timestamp.split(/[\- :\.]/).map(Number);
    return new Date(t[0], t[1]-1, t[2], t[3]-z, t[4], t[5], t[6], t[7]);
}

var input = "2015-01-13 08:52:05.1234";
console.log(parseTimestamp(input).toString());       // 'Tue Jan 13 2015 00:52:06 GMT-0800 (Pacific Standard Time)'
console.log(parseTimestamp(input, true).toString()); // 'Tue Jan 13 2015 08:52:06 GMT-0800 (Pacific Standard Time)'