There is no seven year Tribulation? Really?

Does the Bible describe a seven-year Tribulation? Are you kidding me?

Look at the time frames described in Daniel 9:27, Revelation 11, 12 and 13. The descriptions are with respect to the middle of a group of seven (a week),
1260 and 1260 days
from the middle is "a time, times and half a time" and also,
42 months. It's not that hard, surely.