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Here are some options for a World Holiday List, depending on what you're looking for:

By Region:
Africa: Timkat (Ethiopia), Ugadi (South India), Eid al-Fitr (global Muslim holiday), Diwali (Hindu festival of lights)
Asia: Chinese New Year, Songkran (Thailand), Obon (Japanese Buddhist festival), Rosh Hashanah (Jewish New Year)
Europe: Carnival (various countries), Christmas, Easter, St. Patrick's Day (Ireland)
Latin America: Day of the Dead (Mexico), Carnival (Brazil), Independence Day celebrations (various countries)
North America: Thanksgiving (USA & Canada), Independence Day (USA), Cinco de Mayo (Mexico), Labor Day (USA & Canada)

By Type:
Religious holidays: Christmas, Easter, Hanukkah, Diwali, Ramadan, Eid al-Fitr
Secular holidays: New Year's Day, Independence Day, Labor Day, Thanksgiving
Harvest festivals: Thanksgiving, Thanksgiving Day (Canada), Rosh Hashanah, Sukkot
Unique/unusual holidays: Burning Man (USA), La Tomatina (Spain), Monkey Buffet Festival (Thailand), Holi (India)

General Overview:
Major global holidays: Christmas, New Year's Day, Easter, Eid al-Fitr, Chinese New Year
Holidays by season: Spring - Easter, Holi; Summer - Independence Day celebrations, Carnival; Autumn - Thanksgiving, Halloween; Winter - Christmas, Hanukkah
Holidays based on lunar calendar: Chinese New Year, Eid al-Fitr, Rosh Hashanah

Additional Resources:
Time and Date: Holidays worldwide - https://www.timeanddate.com/holidays/ National Today: World Holidays - https://nationaltoday.com/ Wikipedia: List of multinational festivals and holidays - https://en.wikipedia.org/wiki/List_of_multinational_festivals_and_holidays

The ancient Egyptians developed a sophisticated system for keeping track of time, reflecting their deep connection to the natural world and their belief in cyclical patterns. Here's a glimpse into their unique calendar and clock systems:

Legacy Ancient Calendar for measuring Date and Time:

Solar-based: Unlike many ancient civilizations, the Egyptians used a solar calendar, meaning it was based on the sun's annual cycle. Their year consisted of: 365 days, divided into:
12 months of 30 days each.
5 additional "epagomenal" days added at the end of the year, considered outside the regular months and associated with various deities' birthdays.

Ancient Seasons and Days difference:

The year was further divided into three seasons of 120 days each, reflecting the agricultural cycle:
Akhet (flood season): July-October
Peret (growing season): November-February
Shomu (harvest season): March-June
Months: Each month had three 10-day "decades", named after constellations that rose at nightfall during that period.
Dating system: Dates were typically expressed in a format like "Year X, Month Y, Day Z of the reign of Pharaoh Pharaoh's Name."

Ancient Clocks to check Date and Time:

Sundials: The Egyptians used simple sundials to measure the hours of daylight. These consisted of a vertical stick (gnomon) casting a shadow on a marked horizontal surface.
Water clocks: They also employed water clocks called clepsydras, consisting of vessels with graduations that indicated the passing time as water dripped from one container to another.
Nighttime: At night, they relied on the movement of stars, particularly the decans: groups of ten stars that crossed the night sky each hour.
Hourglasses: Similar in principle to water clocks, hourglasses used sand instead of water to mark the passage of time. They were particularly popular in medieval Europe and remained in use for centuries, even after the invention of mechanical clocks.
Obelisks: These towering stone monoliths served not only as religious symbols but also as giant sundials. The Egyptians and Mayans, among others, used the changing angle of the sun's shadow on the obelisk's edges to determine the time of day and the seasons.
Star charts and celestial observations: By tracking the movements of stars and constellations, ancient astronomers could not only predict celestial events but also estimate the time of night. This method was particularly important for navigation and religious ceremonies.

Unique Aspects:

Leap years: Unlike our modern Gregorian calendar, the ancient Egyptians did not have leap years to account for the slight discrepancy between a solar year and 365 days. This meant their calendar gradually drifted out of sync with the actual seasons over time.
Religious significance: Timekeeping was closely linked to religious beliefs. The Egyptians saw the cyclical nature of time reflected in the rise and fall of the Nile, the phases of the moon, and the cycles of life and death.

Lasting Legacy:

The ancient Egyptian calendar and clock systems influenced later civilizations, including the Greeks and Romans. Their understanding of astronomy and their innovative timekeeping tools continue to fascinate historians and archaeologists today.