January • February • March • April • May • June • July • August • September • October • November • December
1st
- 2000: Episode 44 of Digimon Adventure airs in English for the first time.
- 2001: Episode 1 of Digimon Tamers airs in Japan for the first time.
- 2004: Digimon Racing is released in Japan for the Game Boy Advance.
2nd
- 2000: Episode 1 of Digimon Adventure 02 airs in Japan for the first time.
- 2003: The album Digimon Frontier: Best Hit Parade is released in Japan for the first time.
- 2006: Episode 1 of Digimon Savers airs in Japan for the first time.
3rd
- 2018: The Digimon Tamers Blu-ray BOX is released in Japan together with Digimon Tamers 2018: Days -Information and the Unordinary-.
4th
- 1999: Episode 5 of Digimon Adventure airs in Japan for the first time.
5th
- 2018: Episode 6 of Digimon Adventure tri. has a preview screening in Japan.
- 2020: Episode 1 of Digimon Adventure: airs in Japan for the first time.
6th
- 2002: Episode 40 of Digimon Tamers airs in English for the first time.
- 2014: Episode 24 of Digimon Fusion airs in the United States of America for the first time.
7th
- 2001: Episode 40 of Digimon Adventure 02 airs in English for the first time.
- 2002: Episode 1 of Digimon Frontier airs in Japan for the first time.
- 2008: Episode 25 of Digimon Data Squad airs in English for the first time.
8th
- 2000: Episode 45 of Digimon Adventure airs in English for the first time.
- 2001: Episode 2 of Digimon Tamers airs in Japan for the first time.
9th
- 2000: Episode 2 of Digimon Adventure 02 airs in Japan for the first time.
- 2006: Episode 2 of Digimon Savers airs in Japan for the first time.
10th
Nothing is currently known to have happened on this day.
11th
- 1999: Episode 6 of Digimon Adventure airs in Japan for the first time.
12th
Nothing is currently known to have happened on this day.
13th
- 2002: Episode 41 of Digimon Tamers airs in English for the first time.
14th
- 2001: Episode 41 of Digimon Adventure 02 airs in English for the first time.
- 2002: Episode 2 of Digimon Frontier airs in Japan for the first time.
- 2008: Episode 26 of Digimon Data Squad airs in English for the first time.
15th
- 2000: Episode 46 of Digimon Adventure airs in English for the first time.
- 2001: Episode 3 of Digimon Tamers airs in Japan for the first time.
16th
- 2000: Episode 3 of Digimon Adventure 02 airs in Japan for the first time.
- 2006: Episode 3 of Digimon Savers airs in Japan for the first time.
17th
Nothing is currently known to have happened on this day.
18th
- 1999: Episode 7 of Digimon Adventure airs in Japan for the first time.
19th
Nothing is currently known to have happened on this day.
20th
- 2002: Episode 42 of Digimon Tamers airs in English for the first time.
21st
- 1999: Chapter 6 of Digimon Adventure V-Tamer 01 is published in Japan for the first time.
- 2000: Chapter 18 of Digimon Adventure V-Tamer 01 is published in Japan for the first time.
- 2001: Episode 42 of Digimon Adventure 02 airs in English for the first time.
- 2001: Chapter 30 of Digimon Adventure V-Tamer 01 is published in Japan for the first time.
- 2002: Episode 3 of Digimon Frontier airs in Japan for the first time.
- 2002: Chapter 42 of Digimon Adventure V-Tamer 01 is published in Japan for the first time.
- 2003: Chapter 54 of Digimon Adventure V-Tamer 01 is published in Japan for the first time.
- 2008: Episode 27 of Digimon Data Squad airs in English for the first time.
- 2010: Chapter 10 of Digimon Xros Wars is published in Japan for the first time.
- 2013: Chapter 1 of Digimon World Re:Digitize: Encode is published in Japan for the first time.
- 2014: Chapter 13 of Digimon World Re:Digitize: Encode is published in Japan for the first time.
22nd
- 2000: Episode 47 of Digimon Adventure airs in English for the first time.
- 2001: Episode 4 of Digimon Tamers airs in Japan for the first time.
23rd
- 2000: Episode 4 of Digimon Adventure 02 airs in Japanese for the first time.
- 2002: The CD drama Digimon Frontier Original Story: Things That Want To Be Told is released in Japan for the first time.
- 2006: Episode 4 of Digimon Savers airs in Japanese for the first time.
24th
25th
- 1999: Episode 8 of Digimon Adventure airs in Japan for the first time.
26th
Nothing is currently known to have happened on this day.
27th
- 2002: Episode 43 of Digimon Tamers airs in English for the first time.
- 2002: Digimon Tamers: Battle Spirit Ver. 1.5 is released in Japan for the WonderSwan Color.
28th
- 2001: Episodes 43 and 44 of Digimon Adventure 02 air in English for the first time.
- 2002: Episode 4 of Digimon Frontier airs in Japan for the first time.
- 2008: Episode 28 of Digimon Data Squad airs in English for the first time.
29th
- 2000: Episode 48 of Digimon Adventure airs in English for the first time.
- 2001: Episode 5 of Digimon Tamers airs in Japan for the first time.
30th
- 2000: Episode 5 of Digimon Adventure 02 airs in Japan for the first time.
- 2004: Digimon Racing is released in North America for the Game Boy Advance.
- 2006: Episode 5 of Digimon Savers airs in Japan for the first time.