ClipDateTime is a menu bar app which copies the current date and/or time, or a date and/or time chosen from a calendar-clock control, onto the clipboard when a menu selection is made.
The menu items display various standard and custom formats which are selected or created in the preference window, respectively.
This app also displays the current date and time in the menu bar, in various styles, chosen in the preference window.
When a date and time are selected in the calendar-clock control the menu displays the time difference between the current date its selected date, at the top of the menu.