Yes, as it is the period of time called the millennium, for the second advent is its beginning (heaven passes away) and the 3rd advent its ending (earth passes away).
It cannot occur on 'any' day. It cannot occur today, or even tomorrow. There are events of prophecy that must yet be fulfilled and thus cannot take place until those take place. It is soon though by the signs and events even now transpiring. The exact time is known to God, and won't be known by us until after probation closes and just before Jesus' is seen coming in the clouds of angels when the voice of God the Father speaks it from Heaven.
I MEANT that it can occur on any day of the week. But you're right, for once, that it won't occur today except for those who die today, whose final destination is thus sealed today.
The antichrist/beast must first come & the great trib must occur first, as Jesus said He'd return immediately after the great trib was ended.