On your form that has the Calender (name: slct_date), create a comand button, and a bound or ubound field (name : W_Date) with format short date
set the On Click of the command button to Event procedure :
W_Date = slct_Date
When you select a date from the Calender click the command button, the date on the calender will appear in the W_date field.
You can create as many Command buttons and relate it to specific fields.