The Gregorian calendar is the most-widely used calendar in the world and is also the international standard for showing date and time.​

It is a solar calendar that is based on the movement of the Earth as it circles the Sun.​

Many ancient Hindu calendars, some of which are still used today, are based on the movement of the Moon around Earth.​

What are these types of calendars called?

In class, you learnt about the terms Anno Domini (AD) and Before Christ (BC) that are used to number years in the Gregorian calendar system.​

Considering that it is currently the year 2021 AD and Siddhartha Buddha was born in 480 BC, in what major way are BC and AD years counted differently?

Before the Gregorian calendar was introduced by Pope Gregory in 1582, most of Europe and the European colonies across the world followed something called the Julian Calendar.​

The Julian calendar was introduced by a Roman military general, dictator, and politician known for expanding Rome’s territory.​

Which famous Roman conqueror is the Julian calendar named after?

These were introduced to keep the calendar year in sync with the seasonal year.​

What do these number represent or mean?

The days of the week in English are named after gods from the ancient Roman, Germanic, and Norse religions.​

Some examples are: Monday, after the Moon or Luna, Tuesday, after the Germanic god Tiw, and Wednesday, after the Norse god Odin.​

From which godly character then could Thursday derive its name?