The NCU have switched the Premier League fixtures due to be played on June 22/23rd and 17th August.
They will now be down for decision on the weekend of May 11th and August 31st respectively.
This is to avoid clashes with the interpro T20 Festivals, which are being held at Pembroke on June 22-24, and Bready from August 16-18.
There was a further Festival originally planned for La Manga in September, but with the European T20 tournament now taking place, that has been scrapped.
Cricket Ireland are expected to announce the interpro fixtures and confirmation of the European T20 in the coming days.