solar year
tropical year
astronomical year
equinoctial year

In other words, a solar year has 12 months.

As a result, they do not accurately follow the seasons of the solar year.

You see, 19 solar years contain just about 235 lunar months.

The solar year, however, is not exactly 365 days long.

They had also known by this time that 19 solar years is about equal to 235 lunar months.

Most plans evolve around the solar year of little more than 365 days.

But then, thanks to me, it wasn't a secret anymore, hadn't been for a solar year.

He recognized that the length of the solar year is 365.2417 days.

However, the more precise length of a solar year is about 365.2425 days.

This means that there are often two celebrations per solar year.