Youll begin each month with a bangor at least a laugh and some sciencewhen Leonard, Penny, Sheldon, and the gang are around. Theyre still tackling everyday challenges in relationships and work, while the mysteries of the universe still perplex them on The Big Bang Theory TV series. At least your year will be in order with the 2019 The Big Bang Theory mini calendar. Mini calendars are ideal for lockers and small spaces. These Forest Stewardship Council-certified calendars highlight 13 images in a compact size. Sixteen months (Sep. 2018Dec. 2019).