We might arrive in or be in Amsterdam on Queen's Day (30 Apr). How will that affect visiting sights, getting around, getting from the airport to the central city, and finding open restaurants? Also, is the following day (1 May) also observed as a holiday there? Thanks.
Queen's day is probably the worst day to arrive in Amsterdam:) It's a major holiday, similar to Mardi Gras in New Orleans. The trams will not be running, most all streets in the center of the city will be closed for pedestrians, and all tourist sites will be closed. From the airport the trains to Centraal Station will be running. Depending on how far you hotel is from the station, your best bet is a taxi, though it may not be able to take you right to the front entrance..you may have to do a bit of walking.