So you know how we use a calendar to keep track of days, weeks, months, and years? Well, a long time ago some very smart people wanted to create a calendar that was based on scientific facts and not just made up stories or beliefs. This type of calendar is called a positivist calendar.
The positivist calendar is based on the idea that we can use science to understand the world and make decisions. So they looked at things like how long it takes the Earth to go around the Sun (which is one year) and how long it takes the Moon to go around the Earth (which is about one month). They used these facts to create a calendar that was very accurate.
This calendar has 13 months (instead of the usual 12) and each month has 28 days (instead of varying numbers of days). This means that there are exactly 364 days in a year. The extra day (which usually makes up February 29th in our regular calendar) is celebrated as a day of rest and reflection.
The months in the positivist calendar are named after some very important people in history who have made a big impact on the world. For example, March is named after Julius Caesar (who was a powerful leader in ancient Rome) and October is named after Isaac Newton (who was a famous scientist who discovered a lot about how the world works).
Overall, the positivist calendar is a cool way of using science and history to create a more accurate and meaningful way of keeping track of time.