"Thu, 14 May 1970 07:11:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700514
Only TIME
07:11:42
General datetime
1970-05-14 07:11:42Z
For Database
1970-05-14 07:11:42
For HTTP1.1
Thu, 14 May 1970 07:11:42 GMT