MonsterVerse (1954-1975) - Timeline

[Pro Bot]

Godzilla = 54ACD2
Rodan = E25041
Varan = 008000
Mothra = FBA026
Atragon = 0000FF
Baragon/Gargantuas = CCCCCC
King Kong = 964B00
Zone Fighter = FAC51C

Timeline Reasoning
In Godzilla, there is a direct statement of August 13th. An August calendar can be seen.

In Godzilla Raids Again, the newspapers in the film state 30-1-20 and 30-1-23, placing the movie in January 1955 based off of Showa years.

In Rodan, there is a calendar that has 29 visible days. However, it starts on the 7th day and the month looks like "8月" or "9月". September matches with the month starting on Saturday. It is possible that day 30 is being covered by a white strip at the bottom of the calendar.

Timeline
1945
????
Frankenstein vs. Baragon** (Flashback)

August 6
Frankenstein vs. Baragon** (Flashback)

1954
August 13
Godzilla Chapter 1 (0:00:00 - 0:04:41)
Godzilla Chapter 2 (0:04:42 - 0:06:36)

August 14
Godzilla Chapter 2 (0:06:37 - 0:08:24)
Godzilla Chapter 3 (0:08:25 - 0:10:25)

August
Godzilla Chapter 4 (0:10:26 - 0:15:09)
Godzilla Chapter 5 (0:15:10 - 0:17:16)
Godzilla Chapter 6 (0:17:17 - 0:21:15)
Godzilla Chapter 7 (0:21:16 - 0:23:34)
Godzilla Chapter 8 (0:23:35 - 0:28:24)
Godzilla Chapter 9 (0:28:25 - 0:32:03)
Godzilla Chapter 10 (0:23:04 - 0:33:16)
Godzilla Chapter 11 (0:33:17 - 0:37:17)
Godzilla Chapter 12 (0:37:18 - 0:42:06)
Godzilla Chapter 19 (1:12:05 - 1:15:24)
Godzilla Chapter 12 (0:42:07 - 0:42:35)
Godzilla Chapter 13 (0:42:36 - 0:48:14)
Godzilla Chapter 14 (0:48:15 - 0:54:11)
Godzilla Chapter 15 (0:54:12 - 1:00:01)
Godzilla Chapter 16 (1:00:02 - 1:06:19)
Godzilla Chapter 17 (1:06:20 - 1:09:27)
Godzilla Chapter 18 (1:09:40 - 1:11:17)
Godzilla Chapter 19 (1:11:18 - 1:12:04)
Godzilla Chapter 19 (1:15:25 - 1:15:51)
Godzilla Chapter 20 (1:15:52 - 1:21:00)
Godzilla Chapter 21 (1:21:01 - 1:24:57)
Godzilla Chapter 22 (1:24:58 - 1:28:20)
Godzilla Chapter 23 (1:28:21 - 1:36:34)

1955
January 19
Godzilla Raids Again Chapter 1 (0:00:00 - 0:08:15)
Godzilla Raids Again Chapter 2 (0:08:16 - 0:10:33)
Godzilla Raids Again Chapter 3 (0:10:34 - 0:18:09)
Godzilla Raids Again Chapter 4 (0:18:10 - 0:19:31)

January 20
Godzilla Raids Again Chapter 4 (0:19:32 - 0:21:39)
Godzilla Raids Again Chapter 5 (0:21:40 - 0:22:30)

January 23
Godzilla Raids Again Chapter 5 (0:22:31 - 0:24:55)
Godzilla Raids Again Chapter 6 (0:24:56 - 0:31:00)
Godzilla Raids Again Chapter 7 (0:31:01 - 0:35:54)
Godzilla Raids Again Chapter 8 (0:35:55 - 0:40:29)
Godzilla Raids Again Chapter 9 (0:40:30 - 0:47:06)
Godzilla Raids Again Chapter 10 (0:47:07 - 0:47:46)

January 24
Godzilla Raids Again Chapter 10 (0:47:47 - 0:50:59)
Godzilla Raids Again Chapter 11 (0:51:00 - 0:55:17)
Godzilla Raids Again Chapter 12 (0:55:18 - 0:59:52)

January 25
Godzilla Raids Again Chapter 13 (0:59:53 - 1:05:13)
Godzilla Raids Again Chapter 14 (1:05:14 - 1:08:38)
Godzilla Raids Again Chapter 15 (1:08:39 - 1:11:41)
Godzilla Raids Again Chapter 16 (1:11:42 - 1:14:47)
Godzilla Raids Again Chapter 17 (1:14:48 - 1:21:55)

1956
September
Rodan Chapter 1 (0:00:00 - 0:02:17)
Rodan Chapter 2 (0:02:18 - 0:07:23)
Rodan Chapter 3 (0:07:24 - 0:16:45)
Rodan Chapter 4 (0:16:46 - 0:27:59)
Rodan Chapter 8 (0:46:00 - 0:47:06)
Rodan Chapter 5 (0:28:00 - 0:36:16)
Rodan Chapter 6 (0:36:17 - 0:41:08)
Rodan Chapter 7 (0:41:09 - 0:44:54)
Rodan Chapter 8 (0:44:55 - 0:45:59)
Rodan Chapter 8 (0:47:07 - 0:51:12)
Rodan Chapter 9 (0:51:13 - 0:56:27)
Rodan Chapter 10 (0:56:28 - 1:02:37)
Rodan Chapter 11 (1:02:38 - 1:08:12)
Rodan Chapter 12 (1:08:13 - 1:11:36)
Rodan Chapter 13 (1:11:37 - 1:16:33)
Rodan Chapter 14 (1:16:34 - 1:22:00)

1958
????
Giant Monster Varan**

1960
????
Frankenstein vs. Baragon**

1961
January
Mothra**

1962
June-July
King Kong vs. Godzilla**

1963
????
Atragon**

1964
September
Mothra vs. Godzilla**

1965
January
Gidorah, the Three-Headed Monster**

October
Invasion of Astro-Monster**

1966
????
The War of the Gargantuas**

September
Ebirah, Horror of the Deep**

1967
????
King Kong Escapes**
Son of Godzilla**

1969
????
All Monsters Attack**

1971
????
Godzilla vs. Hedorah**

1972
????
Godzilla vs. Gigan**

1973
????
Godzilla vs. Megalon**
Zone Fighter 1x01, "Destroy the Terror-Beast Missile"**
Zone Fighter 1x02, "Attack! Destro-King"**
Zone Fighter 1x03, "Strike! The Garogas' Underground Base"**
Zone Fighter 1x04, "Invasion! The Garogas' Grand Army: Godzilla Appears"**
Zone Fighter 1x05, "Attack King Ghidorah!"**
Zone Fighter 1x06, "King Ghidorah's Counterattack!"**
Zone Fighter 1x07, "The Zone Family's Critical Moment!"**
Zone Fighter 1x08, "Defeat the Invader of Fear!"**
Zone Fighter 1x09, "Find the Secret of the Red Spider!"**
Zone Fighter 1x10, "Zone Fighter, Destroyed!"**
Zone Fighter 1x11, "In a Hair's Breadth: The Roar of Godzilla!"**
Zone Fighter 1x12, "The Terror-Beast Base: Invade the Earth!"**
Zone Fighter 1x13, "Hair-Raising! The Birthday of Terror"**
Zone Fighter 1x14, "Rampage! The Garoga Boys Attack Force"**
Zone Fighter 1x15, "It's Sinking! Godzilla, Save Tokyo"**
Zone Fighter 1x16, "Terrifying Attack! The Garoga Robot"**
Zone Fighter 1x17, "Go! Fighter, Scramble"**
Zone Fighter 1x18, "Command: "Destroy the Japanese Islands""**
Zone Fighter 1x19, "Order: "Destroy the Earth with Comet K""**
Zone Fighter 1x20, "Fierce Fight! Can You Hear Fighter's Song"**
Zone Fighter 1x21, "Invincible! Godzilla Rages"**
Zone Fighter 1x22, "Counterattack! Defeat Super Jikiro"**
Zone Fighter 1x23, "Secret of the Great Terror-Beast Bakugon"**
Zone Fighter 1x24, "Defeat the Needle Shotting Terror-Beast Needlar"**
Zone Fighter 1x25, "Carnage! Zone & Godzilla vs. the Allied Terror-Beast Forces"**
Zone Fighter 1x26, "Pulverize! The Garoga Gamma-X Strategy"**

1974
????
Godzilla vs. Mechagodzilla**

1975
????
Terror of Mechagodzilla**

1999
????
Destroy All Monsters**

Viewing Order
Godzilla
Godzilla Raids Again
Rodan
Giant Monster Varan
Frankenstein vs. Baragon
Mothra
King Kong vs. Godzilla
Atragon
Mothra vs. Godzilla
Gidorah, the Three-Headed Monster
Invasion of Astro-Monster
The War of the Gargantuas
Ebirah, Horror of the Deep
King Kong Escapes
Son of Godzilla
All Monsters Attack
Godzilla vs. Hedorah
Godzilla vs. Gigan
Godzilla vs. Megalon
Zone Fighter 1x01, "Destroy the Terror-Beast Missile"
Zone Fighter 1x02, "Attack! Destro-King"
Zone Fighter 1x03, "Strike! The Garogas' Underground Base"
Zone Fighter 1x04, "Invasion! The Garogas' Grand Army: Godzilla Appears"
Zone Fighter 1x05, "Attack King Ghidorah!"
Zone Fighter 1x06, "King Ghidorah's Counterattack!"
Zone Fighter 1x07, "The Zone Family's Critical Moment!"
Zone Fighter 1x08, "Defeat the Invader of Fear!"
Zone Fighter 1x09, "Find the Secret of the Red Spider!"
Zone Fighter 1x10, "Zone Fighter, Destroyed!"
Zone Fighter 1x11, "In a Hair's Breadth: The Roar of Godzilla!"
Zone Fighter 1x12, "The Terror-Beast Base: Invade the Earth!"
Zone Fighter 1x13, "Hair-Raising! The Birthday of Terror"
Zone Fighter 1x14, "Rampage! The Garoga Boys Attack Force"
Zone Fighter 1x15, "It's Sinking! Godzilla, Save Tokyo"
Zone Fighter 1x16, "Terrifying Attack! The Garoga Robot"
Zone Fighter 1x17, "Go! Fighter, Scramble"
Zone Fighter 1x18, "Command: "Destroy the Japanese Islands""
Zone Fighter 1x19, "Order: "Destroy the Earth with Comet K""
Zone Fighter 1x20, "Fierce Fight! Can You Hear Fighter's Song"
Zone Fighter 1x21, "Invincible! Godzilla Rages"
Zone Fighter 1x22, "Counterattack! Defeat Super Jikiro"
Zone Fighter 1x23, "Secret of the Great Terror-Beast Bakugon"
Zone Fighter 1x24, "Defeat the Needle Shotting Terror-Beast Needlar"
Zone Fighter 1x25, "Carnage! Zone & Godzilla vs. the Allied Terror-Beast Forces"
Zone Fighter 1x26, "Pulverize! The Garoga Gamma-X Strategy"
Godzilla vs. Mechagodzilla
Terror of Mechagodzilla
Destroy All Monsters

 

[Pro Bot]

Technically yes, but King Kong hasn't had a film in the timeline yet plus it's a new Godzilla-exclusive iteration.

 

[Pro Bot]

Year 1956 Calendar – Japan

Japan 1956 – Calendar with holidays. Yearly calendar showing months for the year 1956. Calendars – online and print friendly – for any year and month

www.timeanddate.com

So is that February 1956? I honestly don't understand the Japanese calendars so I'm just making an assumption here based on the 29 day month.