"Sun, 04 Jan 1970 07:43:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700104
Only TIME
07:43:23
General datetime
1970-01-04 07:43:23Z
For Database
1970-01-04 07:43:23
For HTTP1.1
Sun, 04 Jan 1970 07:43:23 GMT