Vaccinations for 1 year old

Okay so my little one is going to be a year 6 days before Christmas and I can’t get work off to take him to get his shots that week but they don’t schedule the week of Christmas so I would have to go January 2nd is that okay to wait for his vaccinations for those two weeks? Also I was going to ask if I could spread out those ones over a month rather then get them all at once, had anyone ever done this? I’ve talked to a lot of moms who got all shots at once and there babies started to regress and were miserable for a week after the shot, I still want him vaccinatined just want to give his body time. Would love to hear back!