2022
Institutional decision
National First Responders Day
The proclamation is dated and signed October 27, 2022.
Evergreen date guide
What is celebrated on October 27?
See the observances and verified observance-history milestones attached to October 27. Each observance keeps its own source and date details.
Verified history
Today in history →On this date in observance history
Selected observance milestones connected to this date, based on reviewed sources.
2019
First observance
National Tight End Day
49ers coverage in October 2020 described that event as the second annual National Tight Ends Day, supporting the corresponding fourth-Sunday 2019 league-wide edition.
2015
First observance
National Mentoring Day®
Founder Chelsey Baker’s contemporaneous article says she was launching National Mentoring Day on October 27, 2015.
2011
First observance
National Black Cat Day
Cats Protection’s campaign history identifies October 27, 2011 as the first edition.
2011
Precursor
National Black Cat Day
The first campaign became an annual event; in 2012 Cats Protection renamed it National Black Cat Day.
2010
First observance
World Occupational Therapy Day
WFOT explicitly says Occupational Therapy Day was first launched on 27 October 2010.
2007
First observance
World Day for Audiovisual Heritage
UNESCO material describes the 2007 event as the first annual World Day for Audiovisual Heritage.
1991
Institutional decision
Independence Day of Turkmenistan
The official Mejlis consolidated law gives the original Constitutional Law date as 27 October 1991 and number 573-XII.
Reviewed depth
Other in-depth guides on October 27
Source-backedFixed AnnualIn-depth guide
Cranky Co-Workers Day
The first-party Wellcat Holidays calendar lists Cranky Co-Workers Day on October 27 and identifies the collection as created by Thomas and Ruth Roy.
Source-backedFixed AnnualIn-depth guide
National Black Cat Day
Cats Protection states that National Black Cat Day is held each year on October 27, that it launched the first campaign on 27 October 2011 as Black Cat Awareness Day, and that it renamed th…
Source-backedFixed AnnualIn-depth guide
National Mentoring Day®
The official organizer and founder-authored 2015 material establish a 2014 founding, first public edition on October 27, 2015 and continuing October 27 recurrence.
Source-backedFixed AnnualIn-depth guide
World Day for Audiovisual Heritage
UNESCO 33 C/Resolution 5
Source-backedFixed AnnualIn-depth guide
World Occupational Therapy Day
WFOT first-party material verifies annual October 27 observance, first launch on 27 October 2010 and continuing international professional stewardship.
Explore the mix
All topics →Topics represented on October 27
5 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Cranky Co-Workers Day
The first-party Wellcat Holidays calendar lists Cranky Co-Workers Day on October 27 and identifies the collection as created by Thomas and Ruth Roy.
Source-backedFixed AnnualIn-depth guide
National Black Cat Day
Cats Protection states that National Black Cat Day is held each year on October 27, that it launched the first campaign on 27 October 2011 as Black Cat Awareness Day, and that it renamed th…
Source-backedFixed AnnualIn-depth guide
National Mentoring Day®
The official organizer and founder-authored 2015 material establish a 2014 founding, first public edition on October 27, 2015 and continuing October 27 recurrence.
Source-backedFixed AnnualIn-depth guide
World Day for Audiovisual Heritage
UNESCO 33 C/Resolution 5
Source-backedFixed AnnualIn-depth guide
World Occupational Therapy Day
WFOT first-party material verifies annual October 27 observance, first launch on 27 October 2010 and continuing international professional stewardship.
How dates are selected
This page combines fixed annual dates, reusable calendar rules and year-specific dates confirmed for 2026. Variable or historical dates are included only when they are clearly supported.
Read the methodology →