Mormons take gender roles very seriously (in case you didn't follow any of the news in California last year) and, as such, tend to make a big deal out of Mother's Day and Father's Day. They'll even base entire church meetings around those days. However, their approach to the two holidays couldn't be any more diferent.
Mother's Day will usually be celebrated with teary-eyed church members gushing about how important mothers are, and how much they love their own mothers. Stripling warriors and their mothers will be invoked repeatedly. Sentimental poems will be read and church leaders will be quoted about how awesome every mom always is. Flowers might be presented to all the women at church. Maybe even candy.
On Father's Day, men at church will be told to do a better job. They'll be lectured about how important their job is, and how awful everything is because they're slackers. Priesthood meeting will be especially awful. Luckily, most men will assume that the sermons are meant for those other guys, not him, and will blissfully look forward to a steak dinner when he gets home.