generating random time entries before and after midnight Excel - excel

I am trying to generate random time entries between two time limits in Excel. the problem i am facing is the generation works fine with the same day time calculation as soon as the time passes midnight, Excel gets confused and give me wrong values values. I need to generate random entries then match it to the closest value it has in the time series given in the sample workbook. Can anyone help me?
Workbook

Try this :
=IF(ROWS($D$10:$D10)>$F$4,"",IF(HOUR($C$4)<HOUR($C$5),TIME(RANDBETWEEN(HOUR($C$4),HOUR($C$5)-1),INDEX({0,15,30,45},RANDBETWEEN(1,4)),0),IF(HOUR($C$4)=HOUR($C$5),TIME(HOUR($C$4),INDEX({0,15,30,45},RANDBETWEEN(1,4)),0),IF(HOUR($C$4)>HOUR($C$5),TIME(IF(RANDBETWEEN(0,1)=1,RANDBETWEEN(HOUR($C$4),23),RANDBETWEEN(0,HOUR($C$5)-1)),INDEX({0,15,30,45},RANDBETWEEN(1,4)),0),1))))
Hope you can share the results.. (It'll benefit others too) (:

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Subtracting times across a day in excel

I am working on the capstone project in of the Google Career Certificate in Data Analytics. I am using Microsoft Excel. I have to calculate the ride length based on the start and end ride times. I've inputted the formula =F2(end time)-D2(start time) which returns the ride length. Going through my entire list I have some areas where the start time is like 11pm and the end time is 1am and this is returning ###### because it is a negative number with the regular formula. I've found a modified formula that can kind of do the conversion I am looking for but it is still a bit problematic. The modified formula is =(F2-D2+(F2<D2))*24 and it seems to give an accurate ride length if I reformat the answer to number. The issue is the rest of my data is in time format and the modified ones are in number format. If I convert the number values to time, the ride length values are inaccurate.
It is tricky to make the numeric value change as well due to me using a formula. I can correct them one by one after I save Excel and it no longer stores the numbers as the formula, but there are lots of data points to change and that would be time consuming. I'm hoping to find a more concise way to solve this problem. Maybe with a better formula.
[Snippet of the chart 1
Just like everything in life, there are multiple ways to achieve things. I would have formatted the date and time into a single cell; but. if you're gathering the data from another source, that's understandable.
A simple IF statement here will work. IF the days are one apart, then take '1' day off the starting time, else do your original formula:
=IF(E4-C4=1,F4-(D4-1),F4-D4)

How to get the time intervals and total time from a machine recorded minute to minute timestamps data sheet

This is Nikhil.
Here is where I got struck for days, Please help anyone.
I'm having a data of time stamps for every minute in the month.
And there is a corresponding data as well.
Based on the data, i need the time intervals and total operational time and total non operational time in excel.
in this excel file, input table is what im having and output data table is what im desired for....
Thanks you
Nikhil
Edit:
Thank you so much for the first answer,,,
But actually i asked half of the question only to made it understandable.
Now the real problem is - I want the time intervals which are in between the actual shift timings (That are 7:00, 15:00, 23:00).
So that I can calculate the individual shift working and non working hrs.
Please go though the second image's output format.
Second image with updated output shift timings
Thanks for your valuable time.
Done with formulas:
Identifies locations where "Operational/Non Operational" sections begin, then sorts them into final report with array formulas.
See link: (to note, array formulas do not work correctly in Google Sheets, must be viewed in excel. )
https://docs.google.com/spreadsheets/d/1TnYBaVqoH9GbqSOrJhamOVOeJFy5gmQ0/edit?usp=sharing&ouid=113383321265118626810&rtpof=true&sd=true
Array Formula Images:

Absences report in Excel

I've got a problem with finding a solution to my report. Purpose is to know how many times and how long employees spend time on breaks. This report is really imperfect to draw a data.
Purpose of my report:
- we need to know how long brakes they had.
The problem is that in this report I have some days and end date is below the start date - not beside. I copied by formula to have them beside to easily count the time but sometimes can happened that they have irregular leaves - eg. number 14 - he has only 5 records and I can't do it automatically because I need to know which record is missing. In my file is 10.000 records...
Any prompts? Suggestions?
Thank you in advance for any tips!

Excel Sumproduct not working when the condition time and date are put together?

I have a worksheet that is a schedule, and I'm trying to create a graphical display [not chart] of how many people are working per hour window. Before I added the dates, which needed to be done so that shifts starting in the evening and going over midnight could be computed, it was working fine except for midnight shifts. The formula I was using is:
=SUMPRODUCT(F$53:F$67>=($C86+INT(F$5)),F$69:F$83<($D86+INT(F$5)))
Before the date addition, this was working fine[Except for the aforementioned problem]:
=SUMPRODUCT(F$53:F$67>=$C86,F$69:F$83
To where, $C86, is the start time 1-Feb 0:00, and $D86, is the end time 1-Feb 0:59. +INT(F$5) changes the date from 1-feb to an integer to be added to the hour time blocks. I also tried using COUNTIFS to no avail.
Screencap:
First off, is the way I am computing this possible? Secondly, is there a better way to do this? Thanks.

Converting TEXT that represents NEGATIVE TIME value to a number or time value for adding (Excel)

I've got a spreadsheet (Office 2007 version of Excel) full of text entries that are negative time values, example "-0:07" as in an employee took 7 mins less to complete a job than expected. I need to perform mathematical calculations on these entries and am looking for a more elegant formula/method than I've come up with so far.
I know about 1904 date system and * or / by 24 to convert back and forth, the problem is getting a formula that will recognize the text entry as a negative time value.
I've tried value(), *1, which both work on the text fields if the number is positive, but the "-" seems to mess those up. Even paste-special/add fails to recognize these as numbers.
Here's what I came up with that gets the job done, but it's just so ugly to me:
=IF(LEFT(E5,1)="-",((VALUE(RIGHT(E5,LEN(E5)-1)))*-1.0),VALUE(E5))
Obviously my text entry is in cell E5 in this example.
This works, so I'm not desperate for a solution, but for educational purposes (and smaller code) I'd like to know if there's a better way to this. Does anyone have a suggestion for something shorter, easier?
Thanks.
P.S. - an interesting tidbit here, I use Excel at work, but not at home, so I uploaded a sample spreadsheet to Google Docs, and it actually handles the Value() command on those entries properly. Weird, huh?
Thanks again for any suggestions.
Excel doesn't handle time spans in cells. It only deals with time. When you do "00:07" it is then converted to 0.0048611 which is the same as Jan 1st 1900 12.07 am. So if you did 2 minutes minus 7 minutes it would give at best 11.55pm.
The way you do it is the only way.

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