"Thu, 15 Jan 1970 07:51:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
07:51:49
General datetime
1970-01-15 07:51:49Z
For Database
1970-01-15 07:51:49
For HTTP1.1
Thu, 15 Jan 1970 07:51:49 GMT