Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

sainen

proper name. Saturday

Name of Saturday in the seven-day week of the Elves (otsola) in an early word list (PE14/21). The day was related to fire and metals, and was probably derived from “fire”.

Qenya [PE14/021.0602] Group: Eldamo. Published by

makarnisan

proper name. Saturday

Name of the first Saturday in the Valinorian fortnight (PE14/22), a combination of the name of the god Makar and sana “day”.

Qenya [PE14/022.0902] Group: Eldamo. Published by

elenya

noun. Saturday, Saturday, Star-day*
Qenya [PM/130.0402; PM/133.1506] Group: Eldamo. Published by