Hello Knimers : D, hope you´re doing great.
So I was wondering if there´s a way to get time diferrence beetween columns without considering sunday.
For example:
In the last input there’s 2 difference days because it does not count Sunday.
Is there a way, workflow, or node that can help me with this?
BR
-N
Hello @ttsk8der ,
I came up with a solution that uses many nodes with loops. Perhaps not the best solution.
workday cal.knwf (29.8 KB)
maybe this solution, there are actually three for cross verification, are of interest for you. Approach used:
I used Chat GPT to calculate some random dates and their respective count of days w/o Sundays.
| Date 1 | Date 2 | Days Total expected (Chat GPT) | Days without Sundays expected (Chat GPT) | Date 1 TEMP | Day of week (number) | Day of week (name) | Day of week (number) (#1) | Day of week (name) (#1) | Days diff calculated | Weeks diff calculated | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday | Days without Sundays fully calculted | Days without Sundays (Proof 1 GroupBy) | Days without Sundays (Proof 1 manually counted) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-05-01 | 2021-06-03 | 34 | 29 | 2021-04-30 | 6 | Saturday | 4 | Thursday | 34 | 4 | 5 | 5 | 5 | 5 | 4 | 5 | 5 | 30 | 29 | 29 |
| 2021-07-13 | 2022-08-31 | 415 | 356 | 2021-07-12 | 2 | Tuesday | 3 | Wednesday | 415 | 59 | 59 | 60 | 60 | 59 | 59 | 59 | 59 | 356 | 356 | 356 |
| 2021-11-15 | 2022-01-22 | 69 | 60 | 2021-11-14 | 1 | Monday | 6 | Saturday | 69 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 60 | 60 | 60 |
| 2022-02-02 | 2022-03-20 | 47 | 40 | 2022-02-01 | 3 | Wednesday | 7 | Sunday | 47 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 41 | 40 | 40 |
| 2022-04-15 | 2022-07-06 | 83 | 71 | 2022-04-14 | 5 | Friday | 3 | Wednesday | 83 | 11 | 12 | 12 | 12 | 11 | 12 | 12 | 12 | 72 | 71 | 71 |
| 2023-01-04 | 2023-02-06 | 34 | 29 | 2023-01-03 | 3 | Wednesday | 1 | Monday | 34 | 4 | 5 | 4 | 5 | 5 | 5 | 5 | 5 | 30 | 29 | 29 |
| 2023-01-19 | 2023-03-13 | 54 | 46 | 2023-01-18 | 4 | Thursday | 1 | Monday | 54 | 7 | 8 | 7 | 7 | 8 | 8 | 8 | 8 | 47 | 46 | 46 |
| 2023-01-25 | 2023-01-30 | 6 | 5 | 2023-01-24 | 3 | Wednesday | 1 | Monday | 6 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 5 | 5 | 5 |
| 2023-01-25 | 2023-02-06 | 13 | 11 | 2023-01-24 | 3 | Wednesday | 1 | Monday | 13 | 1 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 12 | 11 | 11 |
| 2023-01-30 | 2023-02-03 | 5 | 5 | 2023-01-29 | 1 | Monday | 5 | Friday | 5 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 5 | 5 | 5 |
| 2024-04-07 | 2024-04-08 | 2 | 1 | 2024-04-06 | 7 | Sunday | 1 | Monday | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
Happy Kniming
Mike
if you are into scripting there was a function in numpy for this (so python node required)
import numpy as np
import datetime as dt
start = dt.date(2024, 1, 1)
end = dt.date(2024, 1, 16)
days = np.busday_count(start, end)
print(days)
br
Hello dear @tomljh, @mwiegand, @Daniel_Weikert. Hope you´re doing great.
I really apreciatte all your effort and solutions, also I didn´t express my self properly, so I apologize for that.
The thing I need is to compare dCol1 with dCol2 and substract 24H or 1 day if there´s a Sunday in that time range.
| date1 | date2 | duration |
|---|---|---|
| 25/04/2024 | 29/04/2024 | 3 |
| 27/04/2024 | 29/04/2024 | 1 |
| 26/04/2024 | 30/04/2024 | 3 |
Also I´m trying some ideas I get from your solutions, like using loops, of javaSnippet, but I haven´t found the trick again, I apreciate your time.
Happy weekend
BR - N
@ttsk8der you can use the workflow I provided and either remove 1 day for each Sunday or just one if a Sunday is within that date range. Give it try yourself, you’ve got everything you need 
Hello dear @mwiegand, hope you´re great : D.
So I´m following your WK step by step but I got an issue in the first step, so the next ones are a complete mess.
Extracting fields from “Extract Date&Time Fields”. Data is does not make sense, for example.
I have the following sample.
| D1 | D2 | weekDay | numberDay |
|---|---|---|---|
| 22-01-2024 | 22-01-2024 | 2 | Monday |
| 18-01-2024 | 19-01-2024 | 5 | Thursday |
| 26-01-2024 | 30-01-2024 | 6 | Friday |
The matter here is that, numberWeek appears with one extra number, don´t know if there´s a trouble ocasionated by the previous data process, or if it´s caused by the data type (Date & Time).
I tried to substract the aditional 1 by Math formula or
Rule engine, but any code worked, it just appended a column with -1 Value. I also would appreciate if you can share me the right process or code to solve this issue.
Many thanks.
BR
Hi @ttsk8der,
I can’t quite follow your explanation. Would you mind sharing your workflow please?
Best
Mike
Hello @mwiegand : D
Sure, let me show you the WK and some sample data, also allow me to reformulate my case.
Context: Those are some of the date where my partners did some company process, the problem is, inputs are a mess because the hours are very random. I need to organize the time the process took in laboral hours, which mean that duration outputs should´nt count hours outside or sundays.
I was hoping to do it with some examples but I got more confuse 
so, I apologize for that.
Inside Time ops
I have a huge data set like.
And I´m trying to find the difference between all dates. BUT the difference must consider
I´ve tried:
BR
-N
Hi @ttsk8der,
thanks for the additional details. Do you mind sharing some sample data … just a few rows that contain your problem you’d like to resolve.
Best
Mike
Hi @mwiegand.
I´m sorry, I forgot to attach the sample data, sure here is
Samp date.xlsx (8.4 KB)
Awesome, thanks! Is my assumption correct that each row represents one experiment and thus the date&time stamps of each row should not get separated from each other?
Yes that´s right.
Every row is the moment when some process was made.
I´m doing it w/o separate the time stamps form the dates, but there´s no problem if you need to separate it
Hi @mwiegand.
Thanks for your time and efforts, honestly you gave me some ideas, like substract previous duration.
But honestly I got lost, specially because in my dataset when I´m trying to “Extract Date&Time fields” I got error on the fields with local time. Let me give you an example.
If I select “Locale configuration” in english I got the right week number for the rigth day name , as we can see here:
But if I select any “Locale configuration” in spanish (Have to make my WK in that language) I got the wrong week number for the rigth day name.
With this configuration I´m getting “Jueves (Thursday)” as 5 (Friday), or “Lunes (Monday)” as 2 (Tuesday).
Don´t know if this is a node bug or some issue ocasionated by previous processing .
Again, thanks for your time and efforts.
-N
Hi @ttsk8der,
the reason for that discrepancy is the different start of the week depending on the local time.
If you really wanna feel the pain … watch this 
Best
Mike
