Day Order:
A day order is an order to buy or sell a security that expires at the end of the trading day, when the market closes. If the order is not executed on the day it was placed, the order expires.
Good-until-cancelled (GTC):
It is an order to buy or sell a stock until the order is filled or the investor cancels it.
*Please note: If your GTC order doesnt execute within 90 days, itll be canceled automatically. You can place the limit order again if you wanted to.
How to select Order Duration?