关于世博会期间米兰最后的晚餐预定问题

预订的网页上写的是：
The Ministry of Heritage and Culture and Tourism with the Museums of the Lombardia Region announce the extension of the opening hours of the Museum on the occasion of Expo 2015.
Starting from Monday 4 May untill 31 October 2015 the new opening hour of the Museum will be from 8,30 to 22,00 (last admission 21,45) from Thursday to Sundat, and from 16,30 to 22,00 (last admission 21,45) on Monday. The opening hours on Tuesday and Wednesday remain the same.
Since 30 April 2015 Booking is possible until 18th May.
Since 19 May 2015 it will be possible to reserve new opening hours until August




The following tours are inclusive of a guided tour:


9,30 - 15,30- 19,15: English guided tour
10,00 - 16,00- 19,45: Italian guided tour


Guided tour price for person: Euro 3,50 (plus the admission ticket price.)


想问下是说5月19日以后就不需要预定可以直接看到了么？直接在门口买票就可以？我看说到8月份，我大概是8月初到米兰，还需要预定么？