We did that last year. We made sure we communicated with plenty of time so that people would prepare for it. I held two meetings, one about 2 months before the switch and one about a month to remind everyone and answer any questions. I had a white board in the meeting room, so I drew a calendar and explained what was going to be paid when. We go by calendar year on everything we do, so it only made sense to make if effective on 01/01. People were accepting of it as we gave them enough time to prepare, and some of them were appreciative of it because they would get paid more often and could manage their finances better, according to what they shared. We did this with hour hourly employees, to keep the hourly and exempt payrolls separate, and make it easier to run.
Hope this helps! Feel free to email me if you have any other concerns or questions about it that I did not mention.
Celia Cano ( firstname.lastname@example.org )