Where the names of the days come from

The week of seven days is older than English. Rome named the days for the Sun, the Moon, and five planets known in antiquity: Mars, Mercury, Jupiter, Venus, and Saturn. Those planets were themselves named for Roman gods.

English kept Saturday, Sunday, and Monday close to that pattern. Saturday is Saturn’s day. Sunday is the Sun’s day. Monday is the Moon’s day. The words have worn down, but the roots are still visible if you say them slowly.

A seven-day week

The four middle days were renamed using Germanic gods, when the names were taken over in the languages that became English. Tuesday is Tiw’s day. Wednesday is Woden’s day. Thursday is Thor’s day. Friday is Frigg’s day. The Roman gods of war, commerce, the sky, and love sit underneath those four, in the same order.

Other languages made different choices. Romance languages still show the Roman planets more clearly, in words close to Mars, Mercury, Jupiter, and Venus. The week is the same length. The names are a local coat of paint.

Gods and planets

The order is a convention, not an orbit. Nothing in the sky takes seven days to do what the week claims. The week persists because everyone agrees to share it: pay, worship, school, and the weekend all hang on the same seven names.

Knowing the roots does not change the diary. It does explain why Sunday and Monday sound like the sun and the moon, and why Thursday sounds like thunder.

A seven-day week

The seven day names in English are a mix of planets and old gods. They were fitted onto a Roman week that already had seven days. The week of seven days is older than English. Rome named the days for the Sun, the Moon, and five planets known in antiquity: Mars, Mercury, Jupiter, Venus, and Saturn.

Put those two statements side by side. The first sets the condition. The second says what happens once that condition is met. Where the names of the days come from needs both. Drop the first and the second has nothing to explain. Drop the second and the first is only the scene.

Gods and planets

Rome named the days for the Sun, the Moon, and five planets known in antiquity: Mars, Mercury, Jupiter, Venus, and Saturn. Those planets were themselves named for Roman gods.

The order is the explanation. What the first sentence names has to be there before the result in the second sentence can show up. The piece does not ask you to accept the result first and hunt for a cause afterwards.

A check you can make

Those planets were themselves named for Roman gods. English kept Saturday, Sunday, and Monday close to that pattern.

A fair check is sequential. Confirm the first statement. Then see whether the second is the result of it, rather than a separate fact parked in the same piece. If the result shows up without the condition, this account does not cover what you are looking at.

The limit of the claim

English kept Saturday, Sunday, and Monday close to that pattern. Saturday is Saturn’s day.

The two statements do different jobs. One says what is there, what it is made of, or what acts on it. The other says the change that follows. The title names the change. It is not an inventory of parts.

The same steps, in order

Saturday is Saturn’s day. Sunday is the Sun’s day.

Nothing in the second statement cancels the first. It carries the first forward or marks the limit of it. Remember only the result, and the cause goes missing. Remember only the cause, and you will not know what the piece says happens next.

Why the order matters

Sunday is the Sun’s day. Monday is the Moon’s day.

Read them as one path. Start at the first full stop and do not skip to the outcome. The words between the two statements are the mechanism. The title is the name of that path, not a second claim.

Condition, then outcome

Monday is the Moon’s day. The words have worn down, but the roots are still visible if you say them slowly.

The first statement can be true and still not finish the job. The second statement is the job finishing. Hold both, and the paragraph above stops being a list. It becomes the reason the title is worded as it is.

What the title is naming

The words have worn down, but the roots are still visible if you say them slowly. The four middle days were renamed using Germanic gods, when the names were taken over in the languages that became English.

If you wanted a shorter version, it would be those two sentences and nothing else. Everything added around them is there so the dependence is obvious: the second does not happen unless the first has happened.

What has to come first

The four middle days were renamed using Germanic gods, when the names were taken over in the languages that became English. Tuesday is Tiw’s day.

Put those two statements side by side. The first sets the condition. The second says what happens once that condition is met. Where the names of the days come from needs both. Drop the first and the second has nothing to explain. Drop the second and the first is only the scene.