chore(dateparser): port logic from Angular
chore(dateparser): port logic from Angular

- Port logic from timezone converter from Angular

Closes #5870

vfiles/bootstrap,Servoy/bootstrap,Servoy/bootstrap,looker/bootstrap,angular-ui/bootstrap,BookingBug/bootstrap,RobJacobs/bootstrap,caoruiy/bootstrap,shootermv/bootstrap,caoruiy/bootstrap,byronigoe/bootstrap,angular-ui/bootstrap,RobJacobs/bootstrap,fpipita/bootstrap,BookingBug/bootstrap,byronigoe/bootstrap,wesleycho/bootstrap,shootermv/bootstrap,Kpler/bootstrap,icfantv/bootstrap,fpipita/bootstrap,wesleycho/bootstrap,looker/bootstrap,Kpler/bootstrap,icfantv/bootstrap,vfiles/bootstrap