This collection of the number twenty-four in the Bible covers a large time span and a variety of things.

• Numbers 7:88 – The leaders of the twelve tribes brought two oxen apiece (24 total) as an offering to dedicate the altar.
• Numbers 25:9 – 24,000 Israelites died in the plague that came from the men indulging in immorality with the women of Moab and Midian. Balaam had suggested this to nullify God’s banner of protection over the People when he could not openly curse the nation.
• 1 Chronicles 20:6 and 2 Samuel 21:20 – A giant, a descendant of Rapha, who was killed by David’s nephew, had 24 fingers and toes.
• 1 Chronicles 27:1 – David had twelve divisions of his army that were on duty one month out of the year. Each division had 24,000 men for a total of 288,000.
• 1 Kings 15:33 – Baasha King of Israel reigned for 24 years. He killed Nadab son of Jeroboam and the entire family of Jeroboam to gain power. He continued the sin of Jeroboam, having priests who were not from the family of Aaron.
• 1 Chronicles 24:18 and 25:31 mark the 24^th person on a list.

These are all days when words and visions were given to the prophets. They all are given after Cyrus gave the orders to rebuild the Temple in Jerusalem.

• Daniel 10:4 – On the 24^th day of the first month in the third year of Cyrus King of Persia Daniel was fasting and had a vision. I find it hard to think that Daniel would have fasted through Passover, but this would have been at the end of the Passover and the Feast of Unleavened Bread. It could be the first month of the civil calendar, which would put it at the time of the Day of Atonement. This was near the end of Daniel’s life and close to the time of Ezra.
• Haggai 1:15 – The 24^th day of the sixth month of the second year of King Darius the Great. (This is not the Darius that was in Daniel, and there are several timestamps in Haggai and Zechariah that are very close together.) This is when work started on the Second Temple; it was incorporated into Herod’s Temple that Jesus visited.
• Haggai 2:10 and 18 – These are the 24^th day of the ninth month of the second year of Darius. The foundation of the Temple was laid, and God had Haggai ask the priest a question. The point of the first words from the Lord on this day was to have the people consider carefully how things changed when they finally started building the Temple.
• Haggai 2:20 – This is a separate message that was given on the same day. This was a word of encouragement to Zerubbabel, who is a forefather of Jesus.
• Zechariah 1:7 – On the 24^th day of the eleventh month, the month of Shebat in the second year of Darius a word came to Zechariah. (This is the religious calendar.)
• Nehemiah 9:1 – This is the 24^th day of the seventh month, which is after the Day of Atonement. (religious calendar) This should match the day that Daniel had his vision.  

Hebrew Jewish Months in the Old Testament – Bible History (bible-history.com)

The Elders in the Book of Revelation

• Revelation 4:4 and 10, 5:8, 11:16, and 19:4 are all references to the 24 elders who worship God before His throne.