When will the Old Testament saints and tribulation saints be resurrected?
After the tribulation has run its course and an additional 75 days have passed, the Old Testament saints—including Daniel and all the rest—and the tribulation saints will be resurrected together in their own company. This follows the earlier resurrection companies described in I Corinthians 15:23.
Les explains from I Corinthians 15:23 that resurrection unfolds in ordered companies. Christ and the firstfruits formed the first group; then comes the main harvest, which he identifies as the Body of Christ saved during the age of grace. Only after the tribulation has run its course, plus an additional 75 days, do the Old Testament saints—including Daniel—and the tribulation saints rise in their own company. He ties this to God's historic plan of the ages.
But every man in his own order: Christ the firstfruits; afterward they that are Christ’s at his coming.