Days of the week in English

Hello, some people have doubt of where the names of the days of the week had appeared, then we go to more know a little on the sprouting and the influence of this in the English. In the whole world the names of the days make reference to direct or indirect reference the planets, and this started with the old Romans who identified the days being based on the galaxy.

We can notice that the English received this influence in the formation from the names of the days. They see below:
Sunday (Sunday) - Sun, Day of the Sun.

Monday (Second) - Moon, Day of the Moon.

Tuesday (Third) - Tiw God of the War and the Sky, associated Mars.

Wednesday (Fourth) - Woden King of the Deuses, associated the Mercury.

Thursday (Fifth) - Thor God of the Thunder, associated Jupiter.

Friday (Sixth) - Frigg Woman of Woden, associate Venus.

Saturday (Saturday) - Saturn God of Agriculture, associated Saturn.

The working days we call weekdays, and the end of week of weekend. The names of the days always must be initiated with capital letter and be followed of the definite article “on”.

Ex.: I don't work on Monday.

Ex.: There ploughs many parties on Fridays.

Curiosity: Some curious ones can have a doubt, “Because the days of the week are so different in Portuguese”. The lusitanos had the custom to make commerce in streets and squares, and the region that they would make the “fair” was in the order of second region, third and so on. The first day was not as “First-Fair” for them to dedicate the first day of the week to the God of the Sun.

Research sources:

http://www.englishexperts.com.br/2008/09/03/dias-da-semana-em-ingles/