"Sun, 04 Jan 1970 01:03:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700104
Only TIME
01:03:56
General datetime
1970-01-04 01:03:56Z
For Database
1970-01-04 01:03:56
For HTTP1.1
Sun, 04 Jan 1970 01:03:56 GMT