"Sat, 07 Feb 1970 04:34:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
04:34:03
General datetime
1970-02-07 04:34:03Z
For Database
1970-02-07 04:34:03
For HTTP1.1
Sat, 07 Feb 1970 04:34:03 GMT