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- Algeria, DZ
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- Angola, AO
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Today is: October 05
Apple Betty Day
Black Pound Day (UK)
Chic Spy Day™ (1962)
Do Something Nice Day
Dupuytren Disease Awareness Day (1777)
Frugal Fun Day, Intl.
Fungus Day, Ntl. (UK)
Kimchi Fest (US-PA)
Republic Day, (PT)(1910)
Teacher Day, World (1966)
The Madonna del Lume Celebration, (US-CA)
Active Aging Week
Albuquerque Balloon Fiesta, Intl. (US-NM)
Amputee Awareness Week (AU)
Animal Welfare Week
Borderline Personality Disorder Week (AU)
Carry a Tune Week, Ntl (1746)
Dance Week, Ntl.
Disability History & Awareness Weeks (US/CA)
Elderly Filipino Week (PH)
Emergency Nurses Week
Fat Bear Week
Fire Prevention Week, Ntl. (1871)
Fish Supper, RNLI (UK)
Fish Supper, RNLI (UK)
Golden Week (CN)
Healthcare Foodservice Week, Ntl.
Healthcare Supply Chain Week, Ntl.
Manufacturing Week, Ntl.
Mental Illness Awareness Week
Metric Week, Ntl.
Mystery Series Week
Navratri (H)
Nobel Prize Announcements
Pchum Ben Festival (KH)
Physicians Assistant Week (1967)
Public Relations Week (Getting the World to Beat a Path to Your Door)
Semana Cervantina (ES)(1547)
Space Week, World (1957)
Vegetarian Week, Ntl. (UK)
Walk Your Dog Week, Ntl.
ADHD Awareness Month
Adhik Ashvina (H)
Adopt-a-Dog Month, (AHA)
Adopt-a-Shelter Dog Month
Advertising, Co-op Advertising Awareness Month
Animal Safety & Protection Month, Ntl.
Antidepressant Death Awareness Month
Anxiety and Depression Awareness Month (AU)
Apple Month, Ntl.
Applejack Month
AquaTober
Architecture Month, Archtober
Arts & Humanities Month, Ntl.
Asu (S)
Autism Awareness Month (CA)
Bake & Decorate Month, Ntl.
Bat Appreciation Month
Battery Safety Month (Auto)
Bi-national Health Week (US/CA/MX-varies locally)
Big Draw, The
Big Draw, The
Bilingual Child Month, Celebrating the
Black History Month (UK)
Black Speculative Fiction Month
Blind Month, National Meet the
Blindness Awareness Month
Book Month, Ntl.
Breast Cancer Awareness Month, Ntl.
Bullying Month, Stop, Ntl.
Bullying Prevention Month, Ntl.
Caffeine Addiction Recovery Month
Car Care Month, Ntl. Fall
Caramel Month, Ntl.
Celiac Awareness Month (US)
Cheese Month, American
Chili Month, Ntl.
Chiropractic Health Month, Ntl.
Church Library Month
Church Safety and Security Month, Ntl.
City, Urban October
Class Reunion Month
Clergy Appreciation Month
Co-op Awareness Month
Collegiate Alcohol Awareness Month, Ntl.
Company Culture Month, Global
Company Culture Month, Global
Computer Learning Month
Contact Lens Safety Month
Cookie Month
Corn Month
Country Ham Month
Country Music Month
Crime Prevention Month, Ntl.
Cybersecurity Month, Ntl.
Danger Run (US-KY, IN, IL)
Dental Hygiene Month, Ntl.
Depression Education & Awareness Month
Dessert Month, Ntl.
Disability Employment Awareness Month
Diversity Awareness Month, Global
Domestic Violence Awareness Month
Down Syndrome Month, Ntl.
Dyslexia Awareness Month
Eat Better—Eat Together Month
Eczema Awareness Month
Emotional Intelligence Awareness Month
Energy Action Month, Ntl.
Eye Injury Prevention Month
Festival of Penha (BR-RJ)
Filipino American History Month (1587)
Financial Planning Month
Freethought, Month of, Ntl.
Gain the Inside Advantage Month, Ntl.
Gay & Lesbian History Month (1979)
German-American Heritage Month (1683)
Girls Night In (AU)
Go Sober Month (UK)
Golf Month, Australia
Great Cycle Challenge (AU)
Halloween Safety Month
Head Start Awareness Month
Health Literacy Month
Healthy Lung Month
Healthy Workplace Month (CA)
Hearing, Audiology Awareness Month, Ntl.
Hemophilia, Bleeding Disorders Month, Ntl. (AU)
Hispanic Heritage Month
Home Eye Safety Month
Indoor Air Quality (IAQ) Month, Ntl.
Islamic History Month (CA)
Italian-American Heritage Month (1492)
Kitchen & Bath Month, Ntl.
Learning Disabilities Month, Ntl. (CA/US)
Liver Awareness Month, Ntl.
Lupus Awareness Month (UK)
Medical Librarians Month, Ntl.
Medicine Abuse Awareness, Ntl.
Menopause Month, World
Muslim American Heritage Month (US)
Organize Your Medical Information Month
Orthodontic Health Month, Ntl.
Pedestrian Safety Month
Pescatarian Month, Ntl.
Pet Wellness Awareness Month, Ntl.
Pharmacist Month, American
Photographer Appreciation Month
Physical Therapy Month, Ntl.
Pickled Peppers Month
Pink Ribbon Breakfast (AU)
Pit Bull Awareness Month, Ntl.
Pituitary Awareness Month (UK)
Pizza Month, Ntl. (1984)
Polio Awareness Month, (CA/AU)
Polish-American Heritage Month
Popcorn Poppin' Month, Ntl.
Positive Attitude Month
Principal's Month, Ntl.
Rabi al-Thani (M)
Reading Group Month, Ntl. (1917)
Rett Syndrome Awareness Month
Roller Skating Month, Ntl.
STEM Mentoring Month
Sarcastic Awareness Month
Sausage Month, Ntl
Seafood Month
Seed Gathering Seasons (UK)
Senior's Month (AU-QLD)
Sensory Awareness Month, Ntl.
Shoctober - Defibrillator National Awareness Month (AU)
Spina Bifida Awareness Month, Ntl.
Spinach Lovers Month
Spinal Health Month, Ntl.
Squirrel Awareness and Appreciation Month
Stamp Collecting Month, Ntl
Stop America's Violence Everywhere (SAVE) Month
Substance Abuse Preservation Month, Ntl.
Sudden Infant Death Syndrome (SIDS) Awareness Month
Sunday School Teacher Appreciation Month
Teentober
Tishrei (J)
Turner Prize Exhibition (UK)
U.S.-Mexico Border Health Month
Vegetarian Month
Window Covering Safety Month, Ntl.
Winter Weather Preparedness Weeks (Varies by Location)
Women's History Month (CA)
Women's Small Business Month
Work & Family Month, Ntl.
Workplace Politics Awareness Month
Youth Justice Action Month, Ntl.
LEEP Calendar
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LEEP INK FEATURES
August is Appropos
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About Gregorian Calendar Day
Finance & Banking
Ends: Feb 24, 2024
DESCRIPTION:
On February 24, 1582, Pope Gregory XIII established the Gregorian calendar via a Pappel Bull, the primary calendar used today and underlying international commerce.
The new calendar went into effect on October 4, 1582. In 1752 it became the official calendar throughout most of Europe and the empire colonies. Russia, a holdout, started using it in the 20th century.
The Julian calendar, which the world was using, was created by Julius Cesar. It had a problem, though. It wasn't accurate. Every year it was off by 11.5 minutes. Over centuries, 11 minutes per year adds up. When Pope Gregory established the new calendar, Cesar’s was ten days off.
The Julian calendar added an extra day every four years to account for the extra quarter day it takes the sun to rotate around the earth. We call this a "leap year." This idea may have come from the Hebrew calendar, which adds a thirteenth month, Adar II, to account for the difference between the moon and sun rotations in its leap years.
The Gregorian calendar addressed the missing 11.5 minutes and split time into two eras: before the birth of Jesus Christ (BC) and after the nativity, or anno Domini (AD), "the [first] year of our Lord" in Latin. Of course, non-Christian religions and secularists didn't like this, so they changed it to "Before the Common Era" (BCE) and "Common Era" (CE). No matter what you call it, the demarcation point is still the same: the birth of Jesus Christ.
Orthodox Christians still use the Julian calendar (off by 11 days when the Gregorian calendar was adopted globally in 1752) as their religious calendar, which is why you'll find two different celebrations of Easter and Christmas each year. Other religions use their calendars, most of which follow the movements of the sun, moon, and-or stars. These calendars are shorter than the Gregorian, now the international standard.
The oldest calendar in the world is the Byzantine calendar, which began marking time over 7,500 years ago.
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