LibreOffice Tips and Tricks
From Free Knowledge Base- The DUCK Project: information for everyone
Calc: Date Format and Partial Entry
If you highlight the column and press CNTL-1 a dialog with options appears. Make sure the language is set to English.
When using Excel, a partial date entry such as MM-DD ie: 1-25 will automatically result in conversion to the configured format, for example MM/DD/YYYY or 1/25/2018. This does not occur by default in Calc because Calc doesn't recognize the dash as a date separator. This was not a problem in older versions (3.5x and earlier).
Tip: CTRL + ; will automatically enter the current date in the active cell.