Here’s something to think about or maybe discuss in your group, the days being cut short are almost always assumed to be ending sooner than it should. This isn’t necessarily true.
For example, we could say some kind of tribulation will happen at your work for five days but this plan has changed and now tribulation will be cut short to three days.
If the original tribulation was going to happen Monday through Friday, then there are several options as to what happens when it’s cut short. The tribulation could start on Monday as originally planned and end Wednesday, the tribulation could start later than originally planned by starting on Wednesday and ending Friday, or it could start Tuesday and end Thursday.
What I think should be considered is that the days shortened meaning a later start date does agree with a few verses such as 2 Peter 3:9.
2 Peter 3:9 The Lord is not slack <1019> (I am slow, I delay, tarry) concerning his promise, as some men count slackness <1022> (slowness, delay, tardiness) but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Matthew 24:48 But and if that evil servant shall say in his heart, My lord delayeth his coming;
Matthew 25:5 While the bridegroom tarried, they all slumbered and slept.
Revelation 10:6 (NIV) And he swore by him who lives for ever and ever, who created the heavens and all that is in them, the earth and all that is in it, and the sea and all that is in it, and said, “There will be no more delay!