Imagine and make up a 24-month system of 15-16 days each.

Here's mine:

-January
-Secondary
-February
-Quaduary
-March
-Rebirth
-April
-Starsember
-May
-Pendulumbrary
-June
-Midember
-July
-Earthember
-August
-Sundance
-September
-Fireember
-October
-Spookember
-November
-Milleniumber
-December
-Endember