If the market is open, then you will be able to trade. Please be aware that some futures markets have modified trading hours. The dashboard will aggregate days as one trading day on sessions during modified trading hours.
Example: If the regular opening is on Sunday at 5 p.m. CST with a close at noon on Monday (holiday), all trading statistics for Sunday, Monday, AND Tuesday will be aggregated for Tuesday’s reporting period.
Links for holiday schedule per asset class:
Options and Stocks: https://www.nyse.com/markets/hours-calendars