# The Market Calendar

> Day-by-day market seasonality: how the S&P 500, Nasdaq, Nasdaq-100, Dow, Russell 2000, Bitcoin, Ethereum, Crude Oil and Gold have historically behaved on each day, window and month of the year. Historical averages, not forecasts. Not investment advice.

Cite as: The Market Calendar (marketcalendar.tech), computed from daily closing prices; pages are updated daily.

## For agents
- [MCP server](https://marketcalendar.tech/mcp): remote MCP endpoint (Streamable HTTP, no auth). Tools: list_assets, monthly_seasonality, month_detail, day_seasonality, window_seasonality, seasonal_trends, seasonal_pattern, economic_calendar
- [JSON API](https://marketcalendar.tech/api/v1): free, read-only, 120 requests/hour/IP
- Free tier: monthly statistics for every asset, tested patterns, the economic calendar, and the S&P 500 day by day for the current month. Day-level data for other assets and months, date windows and full-year trends are in Pro: results say pro_required and include https://marketcalendar.tech/?from=api

## Seasonality by asset
- [S&P 500 seasonality](https://marketcalendar.tech/seasonality/sp500): best and worst months, strongest and weakest days
- [Nasdaq Composite seasonality](https://marketcalendar.tech/seasonality/nasdaq): best and worst months, strongest and weakest days
- [Nasdaq-100 seasonality](https://marketcalendar.tech/seasonality/nasdaq-100): best and worst months, strongest and weakest days
- [Dow Jones Industrial Average seasonality](https://marketcalendar.tech/seasonality/dow): best and worst months, strongest and weakest days
- [Russell 2000 seasonality](https://marketcalendar.tech/seasonality/russell-2000): best and worst months, strongest and weakest days
- [Bitcoin seasonality](https://marketcalendar.tech/seasonality/bitcoin): best and worst months, strongest and weakest days
- [Ethereum seasonality](https://marketcalendar.tech/seasonality/ethereum): best and worst months, strongest and weakest days
- [Crude Oil (WTI) seasonality](https://marketcalendar.tech/seasonality/crude-oil): best and worst months, strongest and weakest days
- [Gold seasonality](https://marketcalendar.tech/seasonality/gold): best and worst months, strongest and weakest days

## S&P 500 by month
- [S&P 500 in January](https://marketcalendar.tech/seasonality/sp500/january)
- [S&P 500 in February](https://marketcalendar.tech/seasonality/sp500/february)
- [S&P 500 in March](https://marketcalendar.tech/seasonality/sp500/march)
- [S&P 500 in April](https://marketcalendar.tech/seasonality/sp500/april)
- [S&P 500 in May](https://marketcalendar.tech/seasonality/sp500/may)
- [S&P 500 in June](https://marketcalendar.tech/seasonality/sp500/june)
- [S&P 500 in July](https://marketcalendar.tech/seasonality/sp500/july)
- [S&P 500 in August](https://marketcalendar.tech/seasonality/sp500/august)
- [S&P 500 in September](https://marketcalendar.tech/seasonality/sp500/september)
- [S&P 500 in October](https://marketcalendar.tech/seasonality/sp500/october)
- [S&P 500 in November](https://marketcalendar.tech/seasonality/sp500/november)
- [S&P 500 in December](https://marketcalendar.tech/seasonality/sp500/december)

## Patterns
- [The Santa Claus rally](https://marketcalendar.tech/seasonality/patterns/santa-claus-rally): Does the market really rally at the end of December?
- [Sell in May and go away](https://marketcalendar.tech/seasonality/patterns/sell-in-may): Is the May–October stretch really weaker?
- [The September effect](https://marketcalendar.tech/seasonality/patterns/september-effect): Is September the worst month for stocks?
- [The best days of the year](https://marketcalendar.tech/seasonality/patterns/best-days-of-the-year): Which calendar days have been strongest for stocks?
- [The worst days of the year](https://marketcalendar.tech/seasonality/patterns/worst-days-of-the-year): Which calendar days have been weakest for stocks?
- [The turn-of-the-month effect](https://marketcalendar.tech/seasonality/patterns/turn-of-the-month): Do stocks do better around the start of each month?
- [The presidential election cycle](https://marketcalendar.tech/seasonality/patterns/presidential-cycle): How do stocks do in each year of a presidential term?
- [The January barometer](https://marketcalendar.tech/seasonality/patterns/january-barometer): As goes January, so goes the year?
- [Options expiration and triple witching](https://marketcalendar.tech/seasonality/patterns/options-expiration): How do stocks do on opex days and weeks?
- [The pre-holiday effect](https://marketcalendar.tech/seasonality/patterns/pre-holiday): Do stocks rise before market holidays?
- [The day-of-the-week effect](https://marketcalendar.tech/seasonality/patterns/day-of-the-week): Which day of the week is best for stocks?
- [Midterm-year seasonality](https://marketcalendar.tech/seasonality/patterns/midterm-year): How do stocks move through a midterm election year?

## Optional
- [The calendar app](https://marketcalendar.tech/): interactive day-by-day calendar, trends, notes and alerts (Pro features need an account)