When a temporary philatelic station is operated for more than 1 day, the postmark used for each day of the event must display the date only for that day. Consequently, stations operated for more than 1 day actually require more than one postmark stamp or a stamp that has a “date–plug” for changing dates.
In many cases, the design for a multiple–day event contains a “bull's–eye” whose date changes each day, but other designs incorporate the date in different parts of the text. Exhibit 3–4a shows properly designed postmarks for multiple–day events.
