# How do I do math: NOW - 1 hour? **URL:** \ **Category:** Ask for Help\ **Created:** [January 17, 2023, 11:35am UTC](https://community.glideapps.com/t/how-do-i-do-math-now-1-hour/56798 "2023-01-17T11:35:30Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![erwblo](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/erwblo/32/75_2.png) [@erwblo](https://community.glideapps.com/u/erwblo)\ **Post date:** [January 17, 2023, 11:35am UTC](https://community.glideapps.com/t/how-do-i-do-math-now-1-hour/56798/1 "2023-01-17T11:35:30Z")
I want to make a list of concerts that are coming up or busy. For that reason I want to show only concerts that have a start time after one hour ago. How can I do that in a math column? I do have the NOW column but need NOW - 1 hour (NOW - 1 = NOW a day ago). ---
**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\ **Post date:** [January 17, 2023, 11:39am UTC](https://community.glideapps.com/t/how-do-i-do-math-now-1-hour/56798/2 "2023-01-17T11:39:51Z")
Now - 1/24 ---
**Author:** ![erwblo](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/erwblo/32/75_2.png) [@erwblo](https://community.glideapps.com/u/erwblo)\ **Post date:** [January 17, 2023, 11:40am UTC](https://community.glideapps.com/t/how-do-i-do-math-now-1-hour/56798/3 "2023-01-17T11:40:54Z")
Ah, great! ---
**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/system/32/53398_2.png) [@system](https://community.glideapps.com/u/system)\ **Post date:** [January 18, 2023, 11:40am UTC](https://community.glideapps.com/t/how-do-i-do-math-now-1-hour/56798/4 "2023-01-18T11:40:56Z")
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