Surprise 24-page pocket calendar but can be viewed up to 2 billion years in the future
This infinite calendar can help us read the date of any day in the future.100 years ago, how did Russia take 13 days in February?
The entire population of Russia took nearly half a February, exactly 13 days from 100 years ago.New convenient calendar
Mathematicians and economists at John Hopkins University in Baltimore (USA) have designed a new type of calendar without a leap year. This means that birthdays, holidays andGreat inventions of ancient Egypt
Ancient Egyptian civilization was formed thousands of years ago and is one of the most brilliant ancient civilizations in history.