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Days intended to raise awareness of health, social or environmental issues.

Awareness Days mostly observed in United States.

This list contains only actual holidays. See Good to Know calendar for other noteworthy events.

European civic holidays declared by the European Commission.

Days when it is recommended to raise the national flag.

Noteworthy events which are not actual holidays. Good addition to the Holidays calendar.

Holidays and notable events in Ancient Rome.

National holidays from a country you choose. The events can be machine translated into another language.

Awareness days related to food, drinks and cooking.

A long list of unofficial, funny holidays.

Holidays, awareness days and funny observances related to pets and other animals.

Various doomsday predictions. If the prediction is unspecific, the date is set on the last possible day of the prediction.

Day numbers from 1 to 365 (366). Can skip holidays and weekends if necessary.

Week numbering according to European, American or Middle Eastern standard.

Pay days for people receiving monthly or weekly salary.

Daily work shifts based on a repeating cycle.

Christian liturgical year.

Festivities according to Coptic Christians.

Holydays according to Discordianism.

Discordian Whollydays

Islamic holidays according to the Shia denomination.

Islamic holidays according to the Sunni denomination.

Jewish holidays for people living outside of Israel (Diaspora).

Jewish holidays for people living in Israel.

Pagan holidays and festivals.

Holidays accoring to Pastafarianism.

Holidays according to the Satanic Temple.

A period before the sunrise used for spiritual activities.

Daily prayer times for Muslims.

Daily prayer times for Jews.

When the Moon is close to the Earth and aligned with the Sun, there is a slight increase in the severity and likelihood of volcanic eruptions and earthquakes.

Shows local Blue and Golden Hours, optimal times for outdoor photography.

Shows known meteor showers. On these nights you can expect to see shooting stars in the atmosphere.

Moon rises, sets, phases and other related events.

Past and planned space rocket launches.

Solunar theory uses the Moon and the Sun to predict when fish will feed well.

Sunrise, sunset, solar eclipses, dawn and dusk twilights and other events related to the Sun.

Tides (high tide and low tide) for many locations. They are calculated based on the nearest station, so all locations are not available.

Compresses the history of the universe into a single year.

Shows the days in which the Sun aligns with the streets of a city. In NYC, this is called Manhattanhenge.

Shows the forecast of the day's UV index.

Local weather prediction for up to 5 days.

Movies playing currently in theatres. Dates are country specific.

A proverb for every day.

Notable events in history for each day

Shows which constellation is in the direction of the the Moon.

Zodiac signs and their respective dates.

Shows planets which are in apparent retrograde motion on each day.

International baseball leagues and tournaments.

Basketball matches from the league and team you select.

Formula 1 races from all over the world.

Football games from US leagues.

Formula E races from all over the world.

Ice-hockey matches from the league you select.

Matches from multiple leagues.

Soccer matches from the league you select.

International tennis tournaments.

World Rally Championship races

National elections from all over the world.

Birthdays of notable people

Death dates of notable people

Anniversaries of famous weddings.

Independence days for all countries. Some countries have more than one independence/national day.

International awareness days set by the United Nations.

Armenian

Aztec religious Tōnalpōhualli calendar.

Aztec Xiuhpōhualli calendar.

Coptic

Discordian

Egyptian calendar

Ethiopian

French Republican

Hebrew

Medieval Icelandic calendar.

Also known as the Cotsworth plan, the Cotsworth calendar and the Eastman plan.

Islamic

ISO 8601 numbering

ISO Day Numbering

ISO Week Numbering

North Korean Juche calendar.

Julian

Julian Day Numbers

Mayan Haabʼ calendar.

Mayan Long Count

Mayan religious Tzolkʼin calendar.

Pawukon

Persian

Roman

Shows birthdays and anniversaries and how long time has elapsed from each one.

Personal biorhythms. They are not based on science.

Shows the day when you have reached the same age as famous people reached in their lifetime.

The phases of your menstrual cycle. Requires that your menstrual cycle is fairly regular.

Weekly information on how your pregnancy proceeds and what is happening inside your womb.

Shows events from history which are as far before your birthday as current day is after it. Makes you feel old.

Shows how far in the future or past a certain event is. Can be used when waiting for something.

Define your weight and target weight. This calendar reminds you to weigh yourself and tells you what your current weight should be.