Each exam item (a question with its possible answers) has at least two references to standard books or other sources of project management. Most of the questions reference the PMI A Guide to the Project Management Body of Knowledge (aka the PMBOK Guide).
The Rite of Spring (Le Sacre du Printemps) is a ballet in two parts. The entire ballet was a concept developed by Igor Stravinsky. He wrote the music. The set and costumes were designed by Nicholas Roerich.
In Persian culture the first day of spring is the first day of the first month (called Farvardin) which begins on 20 or 21 March. In other traditions, the equinox is taken as mid-spring. In the traditional Chinese calendar, the spring season consists of the end of winter (from 4 February) and beginning of spring (to 5 May), roughly taking the equinox as its midpoint.