Is a yom/day always = 24 hours?

[tonychanyt]

No. ESV, Ge 2:

1 Thus the heavens and the earth were finished, and all the host of them. 2 And on the seventh day God finished his work that he had done, and he rested on the seventh day from all his work that he had done. 3 So God blessed the seventh day and made it holy, because on it God rested from all his work that he had done in creation.

God created the heavens and the earth in 6 days and rested on the 7th.

4 These are the generations of the heavens and the earth when they were created, in the day that the LORD God made the earth and the heavens.

I.e., in the duration of time that the LORD God made the earth and the heavens.

This usage of "day" was not the same in Ge 2:1.

5 When no bush of the field was yet in the land and no small plant of the field had yet sprung up—for the LORD God had not caused it to rain on the land, and there was no man to work the ground, 6 and a mist was going up from the land and was watering the whole face of the ground.

See also Jesus' resurrection: 3 days and 3 nights vs after 3 days vs on the 3rd day

=========================================================

The following is from Wiki:

Although yom is commonly rendered as day in English translations, the word yom can be used in different ways to refer to different time spans:

• Point of time (a specific day)
• time period of a whole or half a day:
  • Period of light (as contrasted with the period of darkness),
  • Sunrise to sunset
  • Sunset to next sunset
• General term for time ( as in 'days of our lives')
• A year "lived a lot of days"
• Time period of unspecified length. "days and days"

 

[Der Alte]

@tonychanyt Here is the Entry "Day" from the 1906 Jewish Encyclopedia.

DAY (Hebrew , "Yom"):
By: Emil G. Hirsch, Michael Friedlaender
In the Bible, the season of light (Gen. i. 5), lasting "from dawn [lit. "the rising of the morning"] to the coming forth of the stars" (Neh. iv. 15, 17). The term "day" is used also to denote a period of twenty-four hours (Ex. xxi. 21). In Jewish communal life part of a day is at times reckoned as one day; e.g., the day of the funeral, even when the latter takes place late in the afternoon, is counted as the first of the seven days of mourning; a short time in the morning of the seventh day is counted as the seventh day; circumcision takes place on the eighth day, even though of the first day only a few minutes remained after the birth of the child, these being counted as one day. Again, a man who hears of a vow made by his wife or his daughter, and desires to cancel the vow, must do so on the same day on which he hears of it, as otherwise the protest has no effect; even if the hearing takes place a little time before night, the annulment must be done within that little time. The day is reckoned from evening to evening—i.e., night and day—except in reference to sacrifices, where daytime and the night following constitute one day (Lev. vii. 15; see Calendar). "The day" denotes: (a) Day of the Lord; (b) the Day of Atonement; (c) the treatise of the Mishnah that contains the laws concerning the Day of Atonement (See Yoma and Sabbath).​

DAY - JewishEncyclopedia.com

Complete contents the 1906 Jewish Encyclopedia.

jewishencyclopedia.com