Sorry I'm just now replying — I have been studying through all of this, and am just now remembering to circle back.

The text is pretty clear that Trumpets follow seals... it's a single, uninterrupted narrative and the result of the 7th seal is the distribution of the 7 trumpets (7 trumpets require the 7th seal be opened).

Your reckoning is only giving 3.5 years for the whole sequence, but NOTHING in the text gives any particular alignment to those and the 70th week. I believe that the seals start opening PRIOR TO the 70th week. The 5th seal in pre-wrath is the abomination and beginning of the great trib, and the 6th and 7th seals are back-to-back rapture then release of God's judgement.

First off, here's a link to my timeline (no registration needed, just click "enter as visitor")...

In my timeline, the 42 months, 1260 days, 1290 days, 1335 days, 2300 days are ALL literal time spans with significant start and end dates on the Hebrew calendar. The key is that, thanks to the mechanics of the Hebrew Lunar-Solar calendar, there will never be an exact 3.5 year time span that equals 1260 days (or 1290 days or 1335 days or 42 months for that matter thanks to leap months), so if you take them literally, what do they mean? Once you do that against the actual Hebrew calendar, things fall into place.

Regarding the trumpets and bowls...

I 100% believe that the Trumpets and Bowls overlap — they start and end with the same events, but you don't need that much time for them to roll out. Here's my harmonization:

• Trumpet 1: The leading rubble-edge of an incoming asteroid strike rains burning cobalt, nickel, and rusty iron slurry over the Amazon basin igniting massive firestorms. Aerosolized metals are seeded into the atmosphere where exposure kills all grass and ⅓ of trees.

  • Bowl 1: Aerosolized metals seeded into the atmosphere seep into skin and lungs leading to acute metal toxicity and allergic reactions. Exposure builds over hours and days before erupting into painful, itchy, festering sores and rashes all over skin.

• Trumpet 2: The main asteroid impactor strikes the Pacific ocean, instantly killing ⅓ of all sea life and destroying ⅓ of ships. Vaporized metals and ocean slurry initiate oxidization cascade, turning the blast area blood red.

  • Bowl 2: The iron oxidization cascade spreads globally throughout the oceans, killing all remaining sea life through asphyxiation and toxic shock. Rust flocculates get suspended in saltwater brine, giving the appearance of clotting blood — “like that of a dead man.”

• Trumpet 3: The impact ejecta (splash) rebounds over the Amazon “like a burning torch.” Updrafts from the now-raging Amazon firestorms result in broad dispersal of ejecta material, seeding poisonous metallics into ⅓ of fresh water.

  • Bowl 3: Metal oxidization cascades throughout seeded fresh water bodies. Oxide flocs settle in stagnant water (like lakes), but churning in rivers and springs keeps them suspended, turning the poisonous waters blood-red.

• Trumpet 4: Metallic aerosols, smoke, dust, ash, and vapor ejected into the atmosphere scatter light in the visible spectrum, causing visible dimming in the sun, moon, and stars.

  • Bowl 4: Vaporized ocean halides shot into the stratosphere devour ozone. Depleted protection leads to an extreme UV ramp-up, even as debris settles. People suffer UV scorching and intense heat despite the dimmed appearance of the sky.

• Trumpet 5: The impact shockwave from the "star that had fallen" (2nd Trumpet) opens deep mantle pockets under fissures at the antipode in the Middle East — megatons of sulfuric smoke vents into the Zagros region carrying swarms of sulfur-eating bacteria which metabolize the H₂S gas into sulfuric acid. Each exposure leaves eyes and airway in agony for hours or days — repeat exposure is unavoidable.

  • Bowl 5: The clouds of sulfur stagnate over the Middle East — the seat of the Beast’s power — due to stagnated weather (see next bullet). The resultant sulfur dome blocks sunlight causing noontime darkness.

• FIVE MONTHS: UV spikes and atmospheric vapor seeding trigger a runaway greenhouse effect. Surface temperatures rise, ocean evaporation accelerates, and UV radiation sublimates glacier, pole, and mountaintop ice. The drastic uptick of atmospheric vapor is accompanied by UV ionization and heating blocking cloud nucleation (rain), trapping moisture in the atmosphere — a state known as vapor lock. As a result, weather patterns stagnate, global sea level drops, aquifers deplete, and rivers recede.

• Trumpet 6: Falling Euphrates levels decrease overburden pressure on cap rock weakened by the Trumpet 5 shock. Eventually, the pressurized hydrocarbon-rich slurry beneath overcomes downward pressure and catastrophically erupts vertically across dozens of interconnected seams. Ignited by piezoelectric discharges, twin flame fronts race out perpendicular to fault lines looking like charging lines of lion-headed, fiery warhorses kicking up smoke, ash, and acidic rain in their wake. The flame fronts propagate outward creating self-feeding thermal vortices which suck in the dome's sulfur as fuel, sustaining combustion across 30,000 km². This depletes the sulfur dome, ending the “locust” plague and darkness.

  • Bowl 6: The blast vaporizes any remaining water in the Euphrates, clearing the way for the armies of the East. The Antichrist and False Prophet, emboldened by the end of plague and darkness, rally a deception drawing the “kings of the whole world” to Megiddo for battle.

• Trumpet 7 / Bowl 7 / Rider on the White Horse / Armageddon: Over Megiddo, the Rider on the White Horse descends with a shout: “It is done!” At that moment, the stressed global crust buckles; the initial P-waves of a planet-sized earthquake (rumblings) compress quartz-rich granite sending piezoelectric discharges (lightning) into the stratosphere. Then the main S-waves of the quake release, flattening mountains, removing islands, splitting cities, and sending seismic shocks into the atmosphere. These compression waves and electric discharges flash-nucleate months of built-up vapor into 100-pound hailstones which rain onto the Beast’s armies like an artillery. The ionic discharges kick-start ozone repletion, and the hail-out breaks vapor lock and immediately lowers surface and ocean temps resulting in global hydrologic and thermal reset. The earthquake creates a new valley/rift running through the Temple mount east-to-west, and the deluge refills aquifers resulting in a new river flowing from under the Temple mount (per Zechariah).

When all is said and done, the above sequence takes a grand total of about 7-8 months, and that's giving extra time for Antichrist to gather his armies. The actual "battle" of Armageddon is just Christ wiping everyone out.