Fifty-two full weeks will contain 52*6 = 312 pages, with the same number of puzzles.
Non-leap years begin and end on the same day of the week. They have one more day than a full 52 weeks, and as to be expected, will have 313 pages/puzzles:
Sat - Sat: 312 for Sat - Fri plus 1 for Sat
Sun - Sun: 1 for Sun plus 312 for Mon - Sun
Mon - Mon: 312 for Mon - Sun plus 1 for Mon
Tue - Tue: 312 for Mon - Sun plus 1 for Tue
Wed - Wed: 312 for Mon - Sun plus 1 for Wed
Thu - Thu: 312 for Mon - Sun plus 1 for Thu
Fri - Fri: 312 for Mon - Sun plus 1 for Fri
Leap years have two extra days:
Sat - Sun: 312 for Sat - Fri plus 1 for Sat/Sun = 313
Sun - Mon: 312 for Mon - Sun plus 1 for initial Sun plus 1 for final Mon = 314
Mon - Tue: 312 for Mon - Sun plus 2 for Mon and Tue = 314
Tue - Wed: 312 for Tue - Mon plus 2 for Tue and Wed = 314
Wed - Thu: 312 for Wed - Tue plus 2 for Wed and Thu = 314
Thu - Fri: 312 for Thu - Wed plus 2 for Thu and Fri = 314
Fri - Sat: 312 for Fri - Thu plus 2 for Fri and Sat = 314
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