In reading one of your Bible studies I noticed you refer to the Day of the Lord as 3 1/2 years. Does this mean the tribulation period is 3 1/2 years not 7? As McGee says you have to put the cookies on the bottom shelf for some of us.
You won’t find the phrase “Tribulation Period” in the Bible. It’s is a name somebody gave to the 7 year period known as Daniel’s 70th week a long time ago and it has caused confusion ever since. The phrase “Day of the Lord” is used in a number of ways, from defining the entire Church Age to the actual day of the Lord’s return. But it most frequently refers to the Great Tribulation.
Here’s the short explanation. Daniel 9:24-27 says Israel was given 70 weeks of years (490 years) to accomplish 6 goals. It says that after 69 of those weeks (483 years) the Messiah would come but would be rejected and killed, the Temple would be destroyed and the people dispersed.
Then it says that a coming ruler would make a covenant with Israel for one week (the final 7 years), but in the middle of the week would stage an Abomination that causes the Desolation of the Temple. In Matt. 24:15-21 Jesus said that the Abomination of Desolation would kick off the Great Tribulation. So the Great Tribulation is the last half of the last 7 years. 3 1/2 years. The Day of the Lord.