September 12
| [[{{#ifeq:12|1|{{#switch:{{#ifeq:9|1|12|{{#expr:9-1}}}} | 1=January | 2=February | 3=March | 4=April | 5=May | 6=June | 7=July | 8=August | 9=September | 10=October | 11=November | 12=December | 1|12|{{#expr:9-1}}}}
}} {{#switch:{{#ifeq:9|1|12|{{#expr:9-1}}}} |
1=31 | 2=29 | 3=31 | 4=30 | 5=31 | 6=30 | 7=31 | 8=31 | 9=30 | 10=31 | 11=30 | 12=31 | 1|12|{{#expr:9-1}}}}
}} |
{{#switch:9 | 1=January | 2=February | 3=March | 4=April | 5=May | 6=June | 7=July | 8=August | 9=September | 10=October | 11=November | 12=December | 9
}} {{#expr:12-1}}}}|yesterday]] |
[[{{#ifeq:12|{{#switch:9 | 1=31 | 2=29 | 3=31 | 4=30 | 5=31 | 6=30 | 7=31 | 8=31 | 9=30 | 10=31 | 11=30 | 12=31 | 9
}} |
12|1|{{#expr:9+1}}}} | 1=January | 2=February | 3=March | 4=April | 5=May | 6=June | 7=July | 8=August | 9=September | 10=October | 11=November | 12=December | 12|1|{{#expr:9+1}}}}
}} 1|{{#switch:9 |
1=January | 2=February | 3=March | 4=April | 5=May | 6=June | 7=July | 8=August | 9=September | 10=October | 11=November | 12=December | 9
}} {{#expr:12+1}}}}|tomorrow]] | |||||
}
|- |[[{{#switch:{{#if:9| {{#switch:{{#expr: 9 + -1}} |0=12 |13=1 |{{#expr: 9 + -1}} }} |}}{{#if:| {{#switch:{{{daysinmonth}}} |1=31 |2=29 |3=31 |4=30 |5=31 |6=30 |7=31 |8=31 |9=30 |10=31 |11=30 |12=31 | }}|}}{{#if:|{{#ifeq:{{#expr: ({{{isnextmonth}}} + -1) > Template:Cal-date/offset2 }}|1|1|}}|}}{{#if:|{{#ifeq:{{#expr: ({{{isprevmonth}}} + -1) < 1}}|1|1|}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|Template:Cal-date/offset2|{{{getoffsetmonth}}}}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|{{#if:Template:Cal-date/offset2|Template:Cal-date/offset2|1}}|pew{{#expr: {{{getoffsetday}}} + -1}}}}|}} |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |{{#if:9| {{#switch:{{#expr: 9 + -1}} |0=12 |13=1 |{{#expr: 9 + -1}} }} |}}{{#if:| {{#switch:{{{daysinmonth}}} |1=31 |2=29 |3=31 |4=30 |5=31 |6=30 |7=31 |8=31 |9=30 |10=31 |11=30 |12=31 | }}|}}{{#if:|{{#ifeq:{{#expr: ({{{isnextmonth}}} + -1) > Template:Cal-date/offset2 }}|1|1|}}|}}{{#if:|{{#ifeq:{{#expr: ({{{isprevmonth}}} + -1) < 1}}|1|1|}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|Template:Cal-date/offset2|{{{getoffsetmonth}}}}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|{{#if:Template:Cal-date/offset2|Template:Cal-date/offset2|1}}|pew{{#expr: {{{getoffsetday}}} + -1}}}}|}} }}|«]] | colspan="5" align="center"| [[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }}]] |[[{{#switch:{{#if:9| {{#switch:{{#expr: 9 + 1}} |0=12 |13=1 |{{#expr: 9 + 1}} }} |}}{{#if:| {{#switch:{{{daysinmonth}}} |1=31 |2=29 |3=31 |4=30 |5=31 |6=30 |7=31 |8=31 |9=30 |10=31 |11=30 |12=31 | }}|}}{{#if:|{{#ifeq:{{#expr: ({{{isnextmonth}}} + 1) > Template:Cal-date/offset2 }}|1|1|}}|}}{{#if:|{{#ifeq:{{#expr: ({{{isprevmonth}}} + 1) < 1}}|1|1|}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|Template:Cal-date/offset2|{{{getoffsetmonth}}}}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|{{#if:Template:Cal-date/offset2|Template:Cal-date/offset2|1}}|pew{{#expr: {{{getoffsetday}}} + 1}}}}|}} |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |{{#if:9| {{#switch:{{#expr: 9 + 1}} |0=12 |13=1 |{{#expr: 9 + 1}} }} |}}{{#if:| {{#switch:{{{daysinmonth}}} |1=31 |2=29 |3=31 |4=30 |5=31 |6=30 |7=31 |8=31 |9=30 |10=31 |11=30 |12=31 | }}|}}{{#if:|{{#ifeq:{{#expr: ({{{isnextmonth}}} + 1) > Template:Cal-date/offset2 }}|1|1|}}|}}{{#if:|{{#ifeq:{{#expr: ({{{isprevmonth}}} + 1) < 1}}|1|1|}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|Template:Cal-date/offset2|{{{getoffsetmonth}}}}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|{{#if:Template:Cal-date/offset2|Template:Cal-date/offset2|1}}|pew{{#expr: {{{getoffsetday}}} + 1}}}}|}} }}|»]] |- |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 1|1]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 2|2]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 3|3]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 4|4]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 5|5]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 6|6]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 7|7]] |- |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 8|8]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 9|9]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 10|10]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 11|11]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 12|12]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 13|13]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 14|14]] |- |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 15|15]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 16|16]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 17|17]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 18|18]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 19|19]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 20|20]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 21|21]] |- |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 22|22]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 23|23]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 24|24]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 25|25]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 26|26]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 27|27]] |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 28|28]] |- |[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 29|29]] |{{#ifeq:9|2||[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 30|30]]}} |{{#ifeq:{{#if:| {{#switch:{{#expr: {{{monthoffset}}} + 0}} |0=12 |13=1 |{{#expr: {{{monthoffset}}} + 0}} }} |}}{{#if:9| {{#switch:9 |1=31 |2=29 |3=31 |4=30 |5=31 |6=30 |7=31 |8=31 |9=30 |10=31 |11=30 |12=31 | }}|}}{{#if:|{{#ifeq:{{#expr: ({{{isnextmonth}}} + 0) > Template:Cal-date/offset2 }}|1|1|}}|}}{{#if:|{{#ifeq:{{#expr: ({{{isprevmonth}}} + 0) < 1}}|1|1|}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|Template:Cal-date/offset2|{{{getoffsetmonth}}}}}|}}{{#if:|{{#if:Template:Cal-date/offset2Template:Cal-date/offset2|{{#if:Template:Cal-date/offset2|Template:Cal-date/offset2|1}}|pew{{#expr: {{{getoffsetday}}} + 0}}}}|}}|31|[[{{#switch:9 |1=January |2=February |3=March |4=April |5=May |6=June |7=July |8=August |9=September |10=October |11=November |12=December |9 }} 31|31]]|}} | colspan="4"| |}
{{#if:||}}
- 1952 — Yukitoshi Hori (voice of Mine overseer) is born.
- 1967 — Lorenzo Beteta (Castilian Spanish voice of Predacon Megatron in War for Cybertron Trilogy) is born.
- 1976 — Marie Nonnenmacher (French voice of Hashtag, Skywarp and Nova Storm in EarthSpark - Expedition) is born.
- 1986 — The Fight! Super Robot Lifeform Transformers episode "Caused War" premieres in Japan.
- 1986 — Alfie Allen (voice of Tarantulas) is born.
- 1989 — The Victory episode "Crisis! Ambush in the Desert" premieres in Japan.
- 1997 — Claster powers down the Power Block syndication block, which includes Beast Wars.
- 1997 — Shunsuke Takeuchi (Japanese voice of Wheeljack and Thrash) is born.
- 1998 — The Beast Wars episode "Before the Storm" premieres in Germany.
- 2001 — The Robots in Disguise (2001) episode "Bullet Train to the Rescue" premieres in the US.
- 2003 — The Legends of the Microns episode "火星 (しょうとつ) - Mars" premieres in Japan.
- 2003 — The Armada episode "Miracle" premieres on YTV in Canada.
- 2005 — The Transformers: The Movie is released on UMD in the UK by Metrodome.
- 2006 — The Cybertron episode "Warp" premieres in the US.
- 2007 — New Avengers/Transformers #3 is released by Marvel Comics and IDW Publishing.
- 2007 — Best of UK: Dinobots #1 is released by IDW Publishing.
- 2011 — The Prime episode "Masters & Students" premieres in the UK on Cartoon Network and sister channel, Cartoon Network TOO.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 5 premieres in South Korea.
- 2012 — The Transformers: More than Meets the Eye Annual 2012 is released by IDW Publishing.
- 2012 — Transformers Prime Volume 3 — Alien Threat is released on DVD and Blu-ray in Australia and New Zealand by Madman Entertainment.
- 2012 — The Transformers: Prime episodes "Convoy" and "Con Job" premiere in Indonesia.
- 2013 — The Transformers: Prime episode "Evolution" premieres in Hungary.
- 2015 — The Robots in Disguise episode "Battlegrounds, Part 2" premieres on Cartoon Network in the USA.
- 2016 — Final day of the Angry Birds Transformers mobile game's "Flight of the Bumblebee" Challenge Event.
- 2017 — The Transformers Prime compilation DVD "Ultimate Rivals" is released in the US by Shout! Factory.
- 2017 — Transformers: The Last Knight is released on digital.
- 2017 — The Rescue Bots episode "Arrivals" and "Plus One" premieres in Italy.
- 2017 — The Robots in Disguise episode "The Golden Knight" premieres in France
- 2018 — Transformers: Bumblebee - Win If You Dare TPB and reprints of Transformers: Unicron #1 and #2 are released by IDW Publishing.
- 2020 — The Transformers: Cyberverse episode "Battle For Cybertron III" premieres in Germany.
- 2023 — On this Transformers Tuesday, Hasbro announces a reissue of the Titans Return Fortress Maximus and pre-orders go up.
- 2024 — TakaraTomy releases the Transformers One Brave Commander Optimus Prime.
- 2024 — Transformers One is theatrically released in Brazil, Ecuador, Malaysia and Singapore.
- 2024 — "Transformers 40th Anniversary Special Movie" is uploaded onto TakaraTomy's YouTube.