I would agree Jason that the grouping of the 4 horses would look to be linked and roped off for a purpose. Perhaps the opening year? One per quarter? Or maybe much faster?
I have seen commentators link horse one and two together like an action and reaction team. It may be the same with a domino effect of all 4 perhaps.
I see the birth pangs timing as WW1 and WW2 paving the way for Israel. That blends with Matt 24 account too possibly. It would make sense that the two biggest wars in history tied to the birth of Israel to at least qualify as potential official “birth pangs.” At least to me.
The timing i would place the 4 horses is the start of the tribulation. I would get there by how I understand “birth pangs.” It seems a bit of a play on words to a degree.
BIRTH PANGS
Although Islam started in the 600s (we do have the Arab Spring dispersing it throughout the world since 2011) , many coming in His name too seem to be birth pangs as well. There was quite a bit of false messiahs in the late 1st and early second century. And our major Christian cults like (Mormonism, Jehovah’s Witnesses, Unification Church, International churches of Christ, the Nation of Islam, Christian Science, Seventh Day Adventists, and the United Pentecostal Church all started in 1800s or 1900s). Ultimately Christian cults would birth pang into an ultimate AC at some point we might gather.
Israel can be the birth pang as that which goes through Ez 38 & tribulation to birth the 144k (or a more pronounced nation for Christ as a nation).
Pretribulation events occurring to underscore the birth of the tribulation (like earthquakes increasing…we’ve seen bad famines).
I would see though seals and trumpets as birth pangs too. But in a different sense. It would also be according to what the baby ends up being. In the case of seals and trumpets, they give birth to the Great Tribulation period of bowls. Or at least that is how I would look at it.
In the same measure, the entire tribulation could be looked upon on as birth pangs to the millennial kingdom.
So birth pangs can be for: the AC baby, the reborn nation of Israel (unto Christ) baby, the tribulation baby, the great tribulation baby, the full return of Christ birthing, and the millennial kingdom birthing.
SIGN PATTERNS
There are 4 celestial signs in Revelation. Omitting the Sign of the Son of Man, one sign is identified as a judgement sequence: Rev 15:1 “the bowls.” In theory, the other two remaining celestial signs look like perhaps the other two judgement cycles possibly. The red dragon codes in “1/3” (tail sweeping stars) as so do all but one of the trumpet judgements (all in 1/3rd, so looks like a fit). The woman and child look like for seals. A benevolent sign perhaps given during the benevolent age of grace timeframe (as appose to the showing of the other two celestial). If the child is the rapture, then we have 1 celestial sign non-ominous and one seal non-ominous (seal 1-depending on how you look at it…at least it is a candidate for “non-ominous,” possibly, whereas the others don’t come close). Perhaps there is a matching of the 1st seal with rapture timing. If any outliers (judgements prior to the tribulation)…it would only be horse 1…even if that…as far as i could tell. For surely by horse 2, that sounds totally like the tribulation is on to me. And I could not see horse 4 definitely not being in the tribulation. That just sounds horrid nasty. Blessings.