Actually often only namedays were celebrated. Burthdays weren't even considered. My maternal grandparents didn't even remember when their birthdays were. It was utterly unimportant to them. They only celebrated their saints days, which was a big deal for them. In Tchaikovsky's (perhaps also Pushkin's) Eugene Onegin, the famous ball scene in the second act that is taken by most non-Russian audiences to be Tatiana's birthday party, is actually her namesday party.