Common dates used in exchanges to know:

1Y = 1 year

1Q = 1 quarter, indicating 3 months, such as the report deadline is 1Q from now.

4Q represents a whole year.

1D = 1 day, indicating one day, such as the stock price increased by 5% within 1D.

1W = 1 week, indicating 7 days, such as a certain stock's trading volume increased by 20% compared to 1W ago.

1M = 1 month, as a longer time period, such as 1M LIBOR.

12M represents a whole year.

1H = 1 hour, a shorter time span, usually used in high-frequency trading markets, such as the closing price at 1H.