The Donegal Tyrone senior and minor preliminary tie has been penciled in for Sunday 17th May at MacCumhaill Park Ballybofey.
Whoever wins that tie will go through to take on Armagh in the quarter finals on the weekend of the 14th June.
Derry's quarter final game with Down at Celtic Park has a provisional date of Sunday 7th June.
Derry and Downs Ulster U21 preliminary round game will take place on Wednesday 11th March 2015 with the winners through to play Monaghan in the quarter final the following week on the 18th.
Donegal's quarter final with defending champions Cavan is also on Wednesday the 18th March in MacCumhaill Park Ballybofey.
Tyrone's U21's play Fermanagh on the same night.
The dates and venues for the senior championship fixtures are expected to be confirmed in the coming weeks.