"Fri, 06 Feb 1970 04:42:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
04:42:51
General datetime
1970-02-06 04:42:51Z
For Database
1970-02-06 04:42:51
For HTTP1.1
Fri, 06 Feb 1970 04:42:51 GMT