On This Day Calendar, each day is represented by a diamond which is heat sensitive,so when you touch it, the black cover completely disappears and reveal a fact about something historical that happened at that very day. When the residual heat is gone, the diamond will become black again. In addition, there are some space around the black diamonds where you can write down your appointments or diary with a dry erasable marker pen (not included.)
For example, do you know that on the 27th of January, 1880 Thomas Edison invented the light bulb?
On This Day Calendar is a perpetual one so it’ll last indefinitely.
It&rsquos a perfect gift throughout the year!.. and for years to come!
On This Calendar was listed at one of the TOP 50 popular Christmas gifts in 2003. Also, it was chosen as one of the TOP 10 coolest calendars.