enderi

collective name. middle-days

The name used for leap-days added to the various calendar systems of Middle-earth (LotR/1108, 1112). It is a compound of endë “middle” and the suffixal form -re of ré “day”: ✱enderë “middle-day” pluralized to enderi.

Conceptual Development: In the 1st edition of The Lord of the Rings, a similar term atendëa was used.

enderi

middle-days

enderi noun "middle-days" (sg. *enderë), in the calendar of Imladris three days inserted between the months (or seasons) yávië and quellë (Appendix D)

atendëa

double-middle

atendëa noun "double-middle", name of the two enderi or middle-days that occurred in leap-years according to the calendar of Imladris (Appendix D, first edition of LotR)

atendëa

proper name. double-middle

The name of the leap-days used to adjust the Númenórean calendar in the 1st edition of The Lord of the Rings (RC/728). It is a combination of at(a)- “double”, endë “middle” and the adjective suffix -a. In the 2nd edition, the name was changed to the enderi (LotR/1108).