creditcard formatter & date formatter

creditcard formatter

These credit card numbers DO NOT work! They are for testing purposes only. Without a valid owner name, an expiration date and a valid CVV code, they can't be used for real transactions. 

https://www.freeformatter.com/credit-card-number-generator-validator.html

date formatter

https://nsdateformatter.com/#examples

https://github.com/subdigital/nsdateformatter.com

Unicode Common Locale Data Repository (CLDR)

https://cldr.unicode.org/

UNICODE LOCALE DATA MARKUP LANGUAGE (LDML)

https://www.unicode.org/reports/tr35/tr35.html

http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Format_Patterns