Siblings born at the same time of year

[Tucancrossing]

I'm aware this is a really petty question haha.

I really like the time of year my son was born for a whole host of reasons... I liked the way my pregnancy panned out with the seasons, and I just generally like the time of year he's born and like when his birthday is. When thinking of having baby #2 I'm tempted to TTC at the same time as last time. I'm aware you can't guarantee these things, but I've been pregnant twice and both times I fell pregnant instantly, so there's a fair chance it could happen again. If I plan it this way we could have siblings with birthdays very close together. There's the small risk they could be born on the same day as well, although obviously unlikely.

Does anyone have children with birthdays within the same few weeks? What are the pros/cons and would you recommend avoiding it? My husband has pointed out the cost aspect - is this a huge problem, or do you just factor it in with budgeting throughout the year?

Born within a week of each other, 9 years apart.
Too close to Christmas and given the choice would have preferred summer birthdays.

Two boys 4 years and 2 weeks apart in age.
Worked fine for us.
For a few years we were able to get away with a joint birthday party at soft play in a weekend in between.
Brought the costs down a bit, but it is expensive buying presents for two in the same month especially not long after Christmas.

4 days between my boys birthdays! It's fine! Joint parties as they are close in age too!

2nd & 4th exactly 14 years and 2 days apart.