"Wed, 04 Feb 1970 22:40:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
22:40:49
General datetime
1970-02-04 22:40:49Z
For Database
1970-02-04 22:40:49
For HTTP1.1
Wed, 04 Feb 1970 22:40:49 GMT