Generating Current DATE and DATETIME during the integration testing

How to use or generate or deal with Date and Datetime in Zerocode?

e.g.

{
	"id": 1000,
	"createdDay": "${LOCAL.DATE.TODAY:yyyy-MM-dd}",
	"createdDayTimeStamp": "${LOCAL.DATETIME.NOW:yyyy-MM-dd'T'HH:mm:ss.nnnnnnnnn}",
	"randomUniqueValue": "${LOCAL.DATETIME.NOW:yyyyMMdd'T'HHmmssnnnnnnnnn}"
}

resolved to ===> below date and datetime

{
	"id": 1000,
	"createdDay": "2018-02-14",
	"createdDayTimeStamp": "2018-02-14T21:52:45.180000000",
	"randomUniqueValue": "20180214T215245180000000"
}

e.g formats:

output: 2018-02-11  // "uuuu-MM-dd"
output: 2018 02 11  // "uuuu MM dd"
output: 2018        // "yyyy"
output: 2018-Feb-11 // "uuuu-MMM-dd"
output: 2018-02-11  // "uuuu-LL-dd"
Default: date.toString(): 2018-02-11

Note: uuuu prints same as yyyy

output: 2018-02-11T21:31:21.041000000    // "uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSS"
output: 2018-02-11T21:31:21.41000000     // "uuuu-MM-dd'T'HH:mm:ss.n"
output: 2018-02-11T21:31:21.041000000    // "uuuu-MM-dd'T'HH:mm:ss.nnnnnnnnn"
output: 2018-02-11T21:31:21.77481041     // "uuuu-MM-dd'T'HH:mm:ss.A"
output: 2018-02-14                       // "uuuu-MM-dd" or "yyyy-MM-dd"
Default: date.toString(): 2018-02-11T21:31:20.989          // .toString()

See here more-

https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html

     H       hour-of-day (0-23)          number            0
     m       minute-of-hour              number            30
     s       second-of-minute            number            55
     S       fraction-of-second          fraction          978
     A       milli-of-day                number            1234
     n       nano-of-second              number            987654321
     N       nano-of-day                 number            1234000000

All letters 'A' to 'Z' and 'a' to 'z' are reserved as pattern letters. The following pattern letters are defined:

 Symbol  Meaning                     Presentation      Examples
 ------  -------                     ------------      -------
 G       era                         text              AD; Anno Domini; A
 u       year                        year              2004; 04
 y       year-of-era                 year              2004; 04
 D       day-of-year                 number            189
 M/L     month-of-year               number/text       7; 07; Jul; July; J
 d       day-of-month                number            10