# Rounding a date to the half year

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4 - Data Explorer

Hello! I'm new to Airtable and trying to create a formula field based on a date field. The formula should add 1 year to the date (the easy part), then round up to the half year beginning January 1 or July 1. For example,  5/15/23 would calculate 7/1/24; and 10/2/23 would calculate 1/1/25. Any and all help is appreciated!

2 Solutions

Accepted Solutions
18 - Pluto

You can see my thought process for coming up with the formula here in Kuovonne's Guide to Airtable.

Here is an early version of the formula. (For a better version of the formula, use the link to my guide.)

11 - Venus

Hello @ML ,

This formula may also be fine.

``````DATEADD(
DATESTR("7/1/"&YEAR({Date})),
IF(MONTH({Date})>=7,18,12),
"month"
)``````

5 Replies 5
18 - Pluto

You can see my thought process for coming up with the formula here in Kuovonne's Guide to Airtable.

Here is an early version of the formula. (For a better version of the formula, use the link to my guide.)

11 - Venus

Hello @ML ,

This formula may also be fine.

``````DATEADD(
DATESTR("7/1/"&YEAR({Date})),
IF(MONTH({Date})>=7,18,12),
"month"
)``````

4 - Data Explorer

Awesome thank you! They both do the job, though I'm still trying to figure out how @Sho 's solution works 🙂

18 - Pluto

@ML wrote:

I'm still trying to figure out how @Sho 's solution works 🙂

It's a neat solution. I added a discussion of it to the page I linked to in my previous post.

11 - Venus

@kuovonne Excellent explanation!
I agree that using Datetime_parse is a sure thing