The attached file does what you are asking about in your first example. It employees three "helper columns" to show (column C) the run of cells for which the conditions are met, (column D) when each run starts and (column E) when each run ends. Cell N4 shows the number of times a run is started, and the spreadsheet assumes that each run will also end. The formula used in column L to display the beginning of each run is:
The formula used in column M to display the end of each run is:
Copy of List of from date and to date for the given number and period 280915.xlsx
Let me know if you have any questions.
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