Categorise data with date and time parameter

[Philip3210]

Hi All,

I need to group data per day, similar to WEEKDAY, but my "day" runs from 6-6AM, so basing the day on a date only doesn't work. We work a three shift model with the first shift starting at 6AM, so everything from midnight to 6AM should be included in the figure for the previous day.

So, Monday 6AM-Tuesday 5:59AM should be categorised as Monday, for example, and Tuesday 6AM-Wednesday 5:59AM should be Tuesday - I'm a bit at a loss here. Hoping someone has a simple solution.

Hope this illustrates my request better:

Malfunct. start / Start Malfn (T)/ WEEKDAY= / DESIRED OUTPUT
2018/01/29 / 05:59:59 / 1 / 7
2018/01/29 / 06:47:00 / 1 / 1
2018/01/30 / 03:40:00 / 2 / 1
2018/01/30 / 03:57:53 / 2 / 1



Thanks

[FDibbins]

Philip, welkom aan die forum

Waar omtrent in SA?
PE old boy here, from Klerksdorp, now living in USA.

To best describe or illustrate your problem you would be better off attaching a dummy workbook. The workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

To attach a file to your post,
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[FlameRetired]

Sounds like a fire department schedule. 3 day rotations 24hr on 48 off? Is it?

I might have something stored away.