Here are trading tutorials on seasonality. A seasonal pattern is when a certain time of year has a historical tendency to push a price higher or lower. These are the seasonal patterns of the US stock market, popular currency pairs, and commodities.
Each month certain currencies, commodities, and stocks tend to rise or fall with some regularity. These specific assets are highlighted each month, and updated each year:
Forex and Commodity Seasonality For July (nothing of note)
Forex and Commodity Seasonality for April (coming just before the start of April)
Top Performing Stocks in April
If you want an overall view of how currencies and the stock market do throughout the year, then check these out: