Do you run into any discrimination issues if you offer paid maternity leave for female employee's but only unpaid leave for male employee's?

If you have an hourly employee on "light duty", ordered by a doctor, but one of those light duty days is a holiday, are they entitled to be paid 8 hours of holiday pay? I have a situation where an employee was put on light duty for a week and the Monday of that week was a holiday. Since he would have normally only worked that day for 5 hours, instead of 8, he was only paid for 5 hours of holiday pay even though everyone else in the company was paid 8? On his employment offer letter, it states he