Using Multiple Custom Properties to trigger a flow

So having reviewed this
https://help.klaviyo.com/hc/en-us/articles/360002732652-Guide-to-Creating-a-Date-Property-Triggered-Flow
I think our date has been entered in the wrong format

Is it possible to update customer profiles so that the month of interest is changed from 

January
February
March

to

2021/01/01
2021/02/01
2021/03/01….etc

(We don’t need to worry about the calendar year)

Moving forwards, our sign up form is currently set up as 

Label             Value
January         January
February       February
March            March

to get the date in the correct format for future custom property additions, should we set the value to

Label             Value
January         2021/01/01
February       2021/02/01
March            2021/03/01…..etc?

Hi there @AirCooled,

You can make sure the date is formatted appropriately by reviewing this article. 

If you’re trying to target areas of interest, I would consider adding custom profile properties to a customer as they complete an action. Again this would vary based on how your integration and stores are setup.

Thank you!
Alex

@alex.hong - I have already reviewed the date format article before I posted which is what makes me think it has been collected in the wrong format.
Now I need to change the format of the already collected data and make sure all future date data is captured in the correct format.
This is what I need help with……..