December 20
| [[{{#ifeq:20|1|{{#switch:{{#ifeq:12|1|12|{{#expr:12-1}}}} | 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:12-1}}}}
}} {{#switch:{{#ifeq:12|1|12|{{#expr:12-1}}}} |
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:12-1}}}}
}} |
{{#switch:12 | 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
}} {{#expr:20-1}}}}|yesterday]] |
[[{{#ifeq:20|{{#switch:12 | 1=31 | 2=29 | 3=31 | 4=30 | 5=31 | 6=30 | 7=31 | 8=31 | 9=30 | 10=31 | 11=30 | 12=31 | 12
}} |
12|1|{{#expr:12+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:12+1}}}}
}} 1|{{#switch:12 |
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
}} {{#expr:20+1}}}}|tomorrow]] | |||||
}
|- |[[{{#switch:{{#if:12| {{#switch:{{#expr: 12 + -1}} |0=12 |13=1 |{{#expr: 12 + -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:12| {{#switch:{{#expr: 12 + -1}} |0=12 |13=1 |{{#expr: 12 + -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:12 |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 }}]] |[[{{#switch:{{#if:12| {{#switch:{{#expr: 12 + 1}} |0=12 |13=1 |{{#expr: 12 + 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:12| {{#switch:{{#expr: 12 + 1}} |0=12 |13=1 |{{#expr: 12 + 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:12 |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|1]] |[[{{#switch:12 |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 }} 2|2]] |[[{{#switch:12 |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 }} 3|3]] |[[{{#switch:12 |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 }} 4|4]] |[[{{#switch:12 |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 }} 5|5]] |[[{{#switch:12 |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 }} 6|6]] |[[{{#switch:12 |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 }} 7|7]] |- |[[{{#switch:12 |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 }} 8|8]] |[[{{#switch:12 |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 }} 9|9]] |[[{{#switch:12 |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 }} 10|10]] |[[{{#switch:12 |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 }} 11|11]] |[[{{#switch:12 |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 }} 12|12]] |[[{{#switch:12 |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 }} 13|13]] |[[{{#switch:12 |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 }} 14|14]] |- |[[{{#switch:12 |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 }} 15|15]] |[[{{#switch:12 |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 }} 16|16]] |[[{{#switch:12 |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 }} 17|17]] |[[{{#switch:12 |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 }} 18|18]] |[[{{#switch:12 |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 }} 19|19]] |[[{{#switch:12 |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 }} 20|20]] |[[{{#switch:12 |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 }} 21|21]] |- |[[{{#switch:12 |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 }} 22|22]] |[[{{#switch:12 |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 }} 23|23]] |[[{{#switch:12 |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 }} 24|24]] |[[{{#switch:12 |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 }} 25|25]] |[[{{#switch:12 |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 }} 26|26]] |[[{{#switch:12 |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 }} 27|27]] |[[{{#switch:12 |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 }} 28|28]] |- |[[{{#switch:12 |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 }} 29|29]] |{{#ifeq:12|2||[[{{#switch:12 |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 }} 30|30]]}} |{{#ifeq:{{#if:| {{#switch:{{#expr: {{{monthoffset}}} + 0}} |0=12 |13=1 |{{#expr: {{{monthoffset}}} + 0}} }} |}}{{#if:12| {{#switch:12 |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:12 |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 }} 31|31]]|}} | colspan="4"| |}
{{#if:||}}
- 1928 — Aldo César (Brazilian voice of Ram Horn) is born.
- 1936 — Marcos Miranda (Brazillian voice of Blitzwing, Bruticus, Dirge, Hoist, Kup, Swoop, Vector Sigma and more) is born.
- 1963 — Actor Iqbal Theba (UN Secretary General in Transformers: Dark of the Moon) is born.
- 1963 — Bernd Vollbrecht (German voice of Optimus Prime, Theodore Galloway and Affluous) is born.
- 1966 — Yumi Tōma (voice of Shūta Gō, Illumina, Clump, Emusa and Asuka) is born.
- 1967 — Fabrizio Manfredi (Italian voice of Beast Machines Rattrap) is born.
- 1967 — Cecilia Lundh (Swedish voice of Arcee and Override) is born.
- 1971 — Actor Carlos Moreno, Jr. (Manny in Transformers) is born.
- 1971 — Michael Yurchak (voice of Zorillor) is born.
- 1979 — Actor Ramon Rodriguez (Leo Spitz in Revenge of the Fallen) is born.
- 1979 — Choi Ji-hoon (Korean voice of Jazz) is born.
- 1985 — The Super Robot Lifeform Transformers episode "Capture the Negavator!" premieres in Japan.
- 1988 — The Super-God Masterforce episode "BlackZarak - Destroyer from Space" premieres in Japan.
- 1988 — Gabriel Ebling (Brazilian voice of Starscream) is born.
- 1992 — The Headmasters episode "The Mystery of the Pirate Ship" airs in Malaysia.
- 2000 — The Car Robots episode "Counterstrike! Devil Gigatron" premieres in Japan.
- 2000 — Transformers: Car Robots—Vol. 6 is released on DVD in Japan by Pony Canyon.
- 2000 — Transformers: Car Robots—Vol. 1 and Vol. 2 are released on VHS in Japan by Pony Canyon.
- 2000 — The Beast Machines episode "Home Soil" premieres in Germany.
- 2002 — The Armada episode "Gale" premieres in the US.
- 2002 — The Transformers Collection reissues of Smokescreen and Megatron are released in Japan.
- 2002 — Final day to pre-order the Figure Ō exclusive Tigertrack toy.
- 2003 — The Transformers: Victory DVD BOX 02 is released in Japan by Pioneer LDC.
- 2003 — The Armada episode "Decisive Battle" premieres in France.
- 2006 — Escalation issue 2 and "Spotlight: Sixshot" are released in the US by IDW Publishing.
- 2007 — The Headmasters series is released on DVD in New Zealand by Madman Entertainment.
- 2007 — Kazumi Tanaka (voice of Kirk, Suiken and Killbison) dies from pulmonary heart disease at the age of 56.
- 2008 — The Transformers Animated episode "Headmaster" premieres in Italy.
- 2010 — The Macrocosmic Seekers chapter "Hope within the Scrapheap" is e-mailed to e-HOBBY subscribers.
- 2011 — The Transformers: Prime episode "Predatory" premieres in Poland.
- 2011 — The Transformers: Prime episode "Scrapheap" premieres in Brazil and in Latin America.
- 2011 — The Transformers: Prime episode "Metal Attraction" premieres in France.
- 2013 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 1: Part 4 is first published.
- 2014 — The Rescue Bots episode "Bot-Tastic Voyage" premieres on Discovery Family.
- 2016 — The Robots in Disguise episode "Mini-Con Madness" premieres in Hungary.
- 2017 — Optimus Prime #14 and the Till All Are One Annual are released by IDW Publishing.
- 2018 — The Bumblebee movie is released in Austria, Australia, Germany, Greece, Hungary, Israel, Italy, Kuwait, Latvia, Lebanon, Malayasia, Netherlands, New Zealand, Peru, Portugal, Saudi Arabia, Singapore, Slovakia, Thailand, Ukraine and the United Arab Emirates.
- 2019 — The Cyberverse episode "Perfect Storm" is released on the Cartoon Network app.
- 2020 — César Árias (Mexican voice of Inferno, Archibald Witwicky and Akram) dies at age 79.
- 2022 — After having disappeared earlier this July, voice actor Miguel Ángel Ghigliazza was pronouced dead.
- 2023 — Neo Player One reveals the Sofvi Beast Wars Powered Convoy Second Edtion (Primal Prime Deco) vinyl figure.
- 2025 — Age of the Primes Deluxe Wave 5 is officially revealed by Hasbro China at an offline event.