Time duration where we can trade in us

In the US stock market, the main trading session takes place during the daytime from 9:30 a.m. to 4 p.m. Eastern time (ET). However, there are also pre-market and after-hours trading sessions that occur before and after the regular trading hours. Pre-market trading hours are from 4 a.m. to 9:30 a.m. ET, while after-hours trading hours are from 4 p.m. to 8 p.m. ET. These extended trading sessions allow investors to buy and sell securities outside of regular business hours. It's important to note that trading volume during these sessions tends to be thinner, and spreads between the bid and ask prices may be wider.