It seems Looker studio had a bit of an update and ever since I can't get my dates to work.
My excel file saves a .csv with dates formatted as YYYY-MM-DD

and uploads it using CSV file upload.
When connected, it's saving the data as text and when I try to change to the date format I get this error
"Can't convert to date
Looker Studio can't convert Date (Text) to a Date or Date & Time because it doesn't recognize the date format.
Possible solutions:
Change your data to use a supported format
Create a calculated field to convert Date to a valid date. For example, to convert "202011" to a date consisting of year and month:
Example: PARSE_DATE("%Y%m", Date)"
I can change it to the Date & Time option but this doesn't seem to work for my date sensitive graphs.
Has anyone come across this recently? It used to work perfectly fine this way.
Dateappears to use the formatSep 15, 2020, notYYYY-MM-DD. Have you tried using PARSE_DATE, as the message suggested?