"Mon, 05 Jan 1970 01:21:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
01:21:30
General datetime
1970-01-05 01:21:30Z
For Database
1970-01-05 01:21:30
For HTTP1.1
Mon, 05 Jan 1970 01:21:30 GMT