However judicial and Jewsish time reckoning are not YHWH's time reckoning. THe pharisees made their own way in that any part of a day was considered a day so they could "honor" Sabbath for a part of the day and have "fulfilled their duties"
The Encyclopedia Judaica, Day;
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.
Jewish Encyclopedia, DAY (Hebrew, "yom");
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).
This is not Scriptually correct:
John 11:9-10, " יהושע/Yahshua answered, “Are there not twelve hours in the day? If anyone walks in the day, he does not stumble, because he sees the light of this world. But if anyone walks in the night, he stumbles, because the light is not in him.”
Berĕshith/Genesis 1:5, " And Yah called the light ‘day’ and the darkness He called ‘night.’ And there came to be evening and there came to be morning, the first day."
Exodus 12:18, "In the first month, on the fourteenth day of the month, in the evening, you shall eat unleavened bread until the twenty-first day of the month in the evening."
Leviticus 23:32, "It is a Sabbath of rest to you, and you shall afflict your beings. On the ninth day of the month at evening, from evening to evening, you observe your Sabbath.”
"evening" is word # H6153. ereb - Strong's Concordance: ereb: evening, Original Word: עָ֫רֶב, Part of Speech: Noun Masculine, Transliteration: ereb, Phonetic Spelling: (eh'-reb), Short Definition: evening
Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar) 1) evening, night, sunset, 1a) evening, sunset, 1b) night