to buy Christmas and birthday presents for my mom and sister. And they get very cranky if they get combined birthday/xmas presents

or one big present and a small present. If they don't come out even they feel robbed.

getting combo bday/xmas gifts

it must be a common pet peeve

not sure which is worse-combo gifts when your bday is a few days off or 3 weeks later like mine

3 weeks later is worse

yeah, that's what I tell them