Does the probation period for a new job include weekends and holidays?

I have been hired at a new company for a little over two months now and I am constantly wracked with the terror that I am going to be let go for reasons revolving around my ual orientation. No, I don't think they would be stupid enough to say it in so many words, and that is part of the reason it worries me so much - not knowing. So, the probation period is 90 days which ends February 28th ... provided of course that the 90 day probation period includes both holidays and weekends. If yes, then I will be able to breath much easier by the end of this month.