"Mon, 05 Jan 1970 05:50:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
05:50:49
General datetime
1970-01-05 05:50:49Z
For Database
1970-01-05 05:50:49
For HTTP1.1
Mon, 05 Jan 1970 05:50:49 GMT