I would like to know which months I would need to change my water filters.
So for example:
I purchased my water filter on 01/01/18 and the directions say, "replace water filter on a quarterly basis." So now I know I have to change my water filter every 3 months.
How can I have excel show which months they are, or how can I have excel produce the results.
Jan, April, July,October, Jan
Thank you,
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