Prepare two cells. One formatted as DATE, the other with a formula =NOW(). Copy the value of the NOW cell and paste into the formatted cell, using paste special with only DATE+TIME enabled. Note that the formatting has been lost.
The same problem happens with TIME formatting.
thanks for your report. I confirm the behaviour.
I see however, that it will be fixed with the fix for bug 69720 (in 126.96.36.199)
*** This bug has been marked as a duplicate of bug 69720 ***