What It Means
A milestone birthday is a birthday that carries extra weight, usually because of the number. The Cambridge Dictionary gives the 18th, 21st, 30th and 40th as examples. People may mark one with a larger party, a trip or a gathering of relatives who don't see each other every year.
Try It: Count the Days to a Milestone Birthday
Enter an age and the milestone ahead. The count uses an average year of 365.25 days, so it's close, not to the day.
That milestone has already passed. Pick a higher one.
Under three months to go. Book anything that fills up first.
How People Say It
- "She's turning 40 in March, we have to do something."
- "It's a big one, so the whole family's coming."
- "Thirty snuck up on me."
The Breakdown
Worked example. Someone is 36, and their next birthday is 100 days away. Three more birthdays after that one bring them to 40:
| Step | Days |
|---|---|
| Until the next birthday (37th) | 100 |
| Three more years, 37 to 40, at 365.25 days | 1,096 |
| Until the 40th | about 1,196 |
That's roughly 171 weeks, which is plenty of time to save a little each month for a trip or a party.
What the result means. The further out the date, the smaller the monthly amount needed for a bigger plan. Buhata's suggestion for lead times:
| Time to go | Worth doing now |
|---|---|
| A year or more | Pick the kind of celebration and start setting money aside |
| Six months | Choose the date and tell the people who need to travel |
| Three months | Book the venue, the table or the travel |
| One month | Send the details and confirm who's coming |
Good to Know
Which birthdays count as milestonesDevelopmental milestonesSkills most children can do by a certain age, like rolling over or waving bye-bye. CDC places each at the age 75% or more of children reach it. See more isn't fixed. The Cambridge Dictionary's examples are 18, 21, 30 and 40, and families, cultures and the person themselves decide the rest. Asking the birthday person how they want to mark it, or whether they'd rather not, saves planning something they'd dread.
FAQ
What is considered a milestone birthday?
A birthday treated as especially significant. The Cambridge Dictionary gives the 18th, 21st, 30th and 40th as examples.
Is a landmark birthday the same thing?
Yes. The Cambridge Dictionary lists landmark birthday with the same meaning.
How far ahead should I plan a milestone birthday?
There's no rule. Buhata's suggestion is to start about six months out if guests have to travel, and earlier if you're saving up for something bigger.
Do It in Buhata
Birthdays (Plus), Countdown, Goals (Plus)
Add the date in Birthdays (Plus) in Buhata and set a Countdown to the milestone, then save toward the celebration as a Goal (Plus).
Open BuhataRelated Terms and Categories
- Anniversary
The date each year that marks a past event, most often a wedding, and the celebration held on it.
- Birthday party budget
A spending plan for a birthday celebration that sets the total first, then splits it between fixed costs like the venue and costs that grow with each guest.
- Gift budget
A spending plan that sets how much you'll spend on gifts, person by person or occasion by occasion, for a season or a whole year.
Sources
Cambridge Dictionary, "milestone birthday"; Cambridge Dictionary, "landmark birthday"
- dictionary.cambridge.org/us/dictionary/english/milestone-birthday
- dictionary.cambridge.org/dictionary/english/landmark-birthday
Last updated .