Bug in datetime regional settings: 'en' is missing !!!

Bug in datetime regional settings: 'en' is missing !!!

Why regional ['it'] is here, but  ['en'] not ? there are some ['en-<some thing>'] but not a base 'en'.

So from PHP i cannot use en or it AND i cannot user en-US and it-IT and it-CH ...

why ?!?!

It's a big inconsistence (imho)

... and sorry for my bad english

see the file jquery-ui-i18n.js