Annual cycles of fast and festival structure time in ways that persist in societies that are otherwise largely secular.
Lunar and solar calendars
Different bases producing festivals that move or stay fixed.
Which explains why some dates shift each year.
Agricultural roots
Festivals tied to harvest, planting and solstice.
Which predates or underlies many religious observances.
Preparation and aftermath
Periods of anticipation and continuation around major days.
Secular persistence
Public holidays retaining religious dates.
Why calendars diverge
Lunar months do not divide evenly into a solar year, which every calendar system has had to solve somehow.
Which is why some traditions add months periodically and others let festivals drift through the seasons.
The resulting differences are the reason major festivals fall at different times relative to each other year by year.
Fasting and feasting cycles
Periods of restriction followed by celebration.
Which structures the year emotionally as well as practically.
Local variation
The same festival observed differently across regions.
Which is the norm rather than the exception.
Diaspora communities
Observance adapted to different climates and working weeks.
Public recognition
Holidays, school terms and civic observance.
What calendars actually do socially
They coordinate. A festival works because everyone observes it at once, which requires an agreed reckoning of time.
Which is why calendar reform has repeatedly been contentious well beyond the technical question.
Disputes over dating have split communities historically, sometimes permanently.
Intercalation
Adding days or months to keep lunar and solar cycles aligned.
Which several traditions do on defined cycles.
Festivals and food
Specific dishes tied to specific days.
Which is frequently the most durable element.
Commercial adaptation
Festivals absorbed into retail calendars.
Which practitioners have mixed feelings about.
Learning the cycle
Community calendars published annually.
What festivals do beyond observance
They coordinate travel, mark the agricultural year, provide fixed points for family gathering, and give communities a shared narrative repeated annually.
Which is why they persist in societies where the associated beliefs have largely receded.
Public holidays in most countries still fall on dates chosen for religious reasons that a majority of the population may no longer observe.
Multi-faith societies
Calendars accommodating several traditions.
Which employers and schools increasingly do formally.
Seasonal timing
Festivals near solstices and harvests.
Which reflects agricultural origins in many cases.
Domestic observance
Most festival practice happening in homes.
A general note
Practice differs enormously within traditions; communities are the source for their own observance.
How this article treats its subject
Everything here is written descriptively. Where a practice belongs to a living religious tradition, the aim is to say accurately what that tradition does and says about it, without arguing for or against its beliefs. Those are questions for the traditions themselves and for the people who belong to them.
Where research is mentioned, the intention is to report what studies have found rather than what enthusiasts or critics have claimed about them, including where the findings are weaker or more contested than popular coverage suggests.
A note on why the history matters
A great deal of contemporary spiritual and wellbeing material presents itself as ancient when it is recent, or as universal when it belongs to a particular tradition and place. Neither of those is necessarily dishonest, and both make it harder to understand what one is actually doing.
Knowing where a practice comes from, who developed it, what it was originally for and what changed along the way does not diminish it. It usually makes it more interesting, and it makes claims about it easier to evaluate.
Where to read further
Primary texts in good annotated translations, academic histories, and practitioners speaking about their own tradition are all more reliable than secondary summaries, including this one. Most of the traditions discussed here have extensive scholarly literature accessible to general readers, and university presses publish short introductory volumes on nearly all of them.
Where a practice has physical or psychological effects, medical and mental health professionals are the appropriate source of guidance, and nothing here is intended as advice of that kind.
On sources and disagreement
Scholars disagree about much of this material, sometimes sharply, and where that is the case it has been noted rather than resolved. Presenting contested questions as settled would be more comfortable to read and less accurate.
That applies particularly to questions of origin and influence, where the evidence is frequently thin and the temptation to fill gaps with a tidy narrative is strong. Where something is genuinely uncertain, the honest description is that we do not know.
A final word on approach
Traditions described here belong to living communities of people who practise them seriously. Writing about them from outside carries an obligation to get the details right and to avoid claiming more familiarity than the writing supports.
Where this article is thin, the traditions own sources are the correction.