Hello. I think in this matter many times. And I show my reasoning.
For me, not exist a exact time conversion between terrenal time and celestial time.
Psalm 90:4 says that for Jehovah 1000 years terrenal time are like 24 hours celestial time or like a watch during the night, 4 hours celestial time.
1000 years terrenal = 24 or 4 hours celestial time.
Based in this, I think that the creative days not have the same duration. For example, the 7th day can be 7000 (4 hrs celestial * 7) years long like and the rest of days, each 42000 years long (24 hrs celestial * 7).
Now,
Matthew 24:20-22 says that pray for the great tribulation not come in winter. If the great tribulation will be a global event, then some people live it in winter and other in summer. But that text show that the exact day and time of the great tribulation is subject to changes accorgind to prayers. For example, if Jehovah set the date of the great tribulation for winter, and christian pray for the great tribulation come in autumn, Jehovah can listen and set the great tribulation for autumn. Also the duration of the great tribulation is not exactly, because that days will be adjusted for have survivors, the duration of the great tribulation will "cut short".
If the Armageddon have exact day and hour that Jehovah knows (Matthew 24:36), the great tribulation NOT have exact day and hour. If it would have, it will not be "cut short", because it would move the armaggedon exact date.
Now if we consider the day of Jehovah composed of great tribulation + armaggedon the words of Jesus in Matthew 24:20 indicates that the exact day and hour that the Father knows, is a date with begin relative, adaptable to prayers, and with duration adaptable for have survivors.
