How can I say "on monday" e.g. "On monday I (always) play"?

xpos:How can I say "on monday" e.g. "On monday I (always) play"?

I believe it would be, "Mi cxiam ludas lunde."

AxelMajere:I believe it would be, "Mi cxiam ludas lunde."

Thanks. So it's used like an adverb?

Lunde, mi ĉiam ludas.

nokte - at night
Link

Somere estis tre varma vetero. - In the summer there was very warm weather.
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From the Tekstaro site:
...nur lunde ni iros hejmen
Ni ludis lunde interkonatiĝajn kaj...

I can't explain why it is like this but I have just memorized it. When you want to describe a time just use the E ending.

It is very easy to understand if you break free of your English-thinking chains. I can make any word into any part of speech in Esperanto (so long as it makes sense).

Take the word "daily" as an example. You start with "tago" and add the adverb ending to get "tage". This is an exact reflection of English, where we take "day" and turn it into "daily" (day-ly). The main difference here is that Esperanto is far more general, so we can do the same trick with "Monday" to get "Monday-ly" (Lundo -> Lunde). English isn't so flexible, so we have to use a phrase to do the same. There is no need to memorize here, you just need to stop thinking in English (I know, hard to do).

A related feature to this is adverbial participles, as shown in this example sentence from "Being Colloquial in Esperanto":
"Ecx pafote silentadus li." --> "Even about to be shot he would remain silent."

The entire phrase "about to be shot" has to be used in English to replace the one-word "pafote".

One thing to note is that the PMEG does not use "adverb" or "noun" or other familiar grammatical definitions, and instead uses "o-vortoj", "a-vortoj", and "e-vortoj" to describe the Esperanto grammar. If the word is an e-word it can describe the verb of the sentence. "Lunde" describes when you "ludi" - on Monday.

Thanks for all the answers. I think I now understand

xpos:Thanks for all the answers. I think I now understand

Nedankinde, we're here to help.

The others are correct; "lunde" is defo what you want here

More info:

If you want to say "on monday" but meaning a specific monday, instead of all mondays, you can use the "-n" or "en":

Merkredon mi kantos = On wednesday, I will sing.
En merkredo mi kantos = On wednesday, I will sing.

See the relevant PMEG page:
http://bertilow.com/pmeg/gramatiko/rolmontriloj/n/...

Also, Alkanadi made an error:

Alkanadi:Lunde, mi ĉiam ludi.

It should be: Lunde, mi ĉiam ludas