"Thu, 01 Jan 1970 12:23:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
12:23:47
General datetime
1970-01-01 12:23:47Z
For Database
1970-01-01 12:23:47
For HTTP1.1
Thu, 01 Jan 1970 12:23:47 GMT