You Tube Theology

ἡμέρα means “day.”

“Concerning that ἡμέρα and hour, no one knows except the Father”(Matt 24:36).

Noun: ἡμέρα (hēmera), GK G2465 (S G2250), 389x. ἡμέρα is an indication of time that can refer to either a literal day (24–hour period of time) or a period of time that is unspecified (cf. Heb. yôm). As to the former, ἡμέρα is often linked with νύξ (“night,” 23x) to indicate a cycle of time as “night and day” (e.g., Lk. 2:37; cf. Mt. 4:2; Acts 9:24; 1 Thess. 2:9; Rev. 4:8). However, ἡμέρα most frequently indicates a period of time of unspecified length, as in Mt. 23:30, “the days of our forefathers.” In the NT, 49 times we read about “those days” or in “that day.” ἡμέρα can also indicate the time between Christ’s first coming and second coming known as the “last days.” Finally, ἡμέρα is used in an end-time sense to denote future events. Jesus declares in Jn. 6:40, “everyone who looks to the Son and believes in him shall have eternal life, and I will raise him up at the last day.” This “last day” refers to the time of judgment at the consummation of the ages.

(The dictionary entry is abridged from “Mounce's Complete Expository Dictionary of Old and New Testament Words” (https://billmounce.com/dictionary).