In date fields you can use some keys, such as á and â, in the same way as you would in regular fields. To choose a date using the keyboard, use the following keys and keyboard shortcuts:
Action  | 
Press  | 
Show the calendar to choose a date  | 
ALT+á  | 
or:  | 
ALT+â  | 
Close the calendar without choosing a date  | 
ESC  | 
or:  | 
ALT+F4  | 
Browse the dates  | 
á â ß à  | 
Choose a date  | 
ENTER  |