I've tried filtering on the those that need correcting and using the filtergram into text but that does not work. The only way I can find to fix is to use custom value and insert the correct number but I have to use the original excel file to refer to.
@vlruch67 Are you looking for a change of display format for the dates in Paxata? If yes, we always display the formats in the way @ebarre's comment above shows it. If you want to view it in a different format like yyyy/mm/dd you can do certain other computed columns like: