"Sun, 10 May 1970 07:12:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700510
Only TIME
07:12:39
General datetime
1970-05-10 07:12:39Z
For Database
1970-05-10 07:12:39
For HTTP1.1
Sun, 10 May 1970 07:12:39 GMT