||Jethro brought burnt offerings and [other] sacrifices to God. Aaron and all the elders of Israel came to share the meal with Moses' father-in-law before God.
Vayikach Yitro choten Moshe olah uzvachim l'Elohim vayavo Aharon vechol zikney Yisra'el le'echol-lechem im-choten Moshe lifney ha'Elohim.
The next day, Moses sat to judge the people. They stood around Moses from morning to evening.
Vayehi mimachorat vayeshev Moshe lishpot et-ha'am vaya'amod ha'am al-Moshe min-haboker ad-ha'arev.
See note on Genesis 8:20.
Aware of God's presence (Ralbag; Hirsch). Others say that 'before God' denotes that they were in front of the altar Moses had built (Exodus 17:15; Sforno; Abarbanel), the burning bush (Josephus 3:3), Mount Sinai (Ralbag), or Moses' tent (Ibn Ezra, Sekhel Tov). Or, 'of what was offered before God' (Chizzkuni).
|The next day|
Simply, the day after Jethro had come (Ibn Ezra; Ramban; Josephus 3:4:1). There is however, a tradition, that this was on the day after Yom Kippur, right after Moses came down with the second set of Tablets (Mekhilta; Targum Yonathan; Rashi; see Exodus 34:29, Deuteronomy 10:5).