Hi Farias, I think you can use this option to input custom format

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Classic Analysis:

Thks Kailash for your quick and gentle response :-)

Unfortunately the manual input of the format doesn't fit my requirements, because in my case I need to show a Unix timestamp in DD:HH:MM:SS format, but the DD part is the number of days since the start of the date in the timestamp, not the month day.

I could do it creating a function / procedure like we do in databases, but here I think it's not possible to to do something similar.

Excel deals with this scenario very well:

Thank you again.