A trading day is considered from 6PM ET- 5PM ET the next day.
For example, if you trade Sunday night at 6 PM, then trade again on Monday morning, that is not two separate trading days. It is considered one trading day and all trades will be counted towards Monday trades. However, if you trade Monday morning, then again Tuesday morning, then yes, that is two trading days.
Most holidays, where the market is closing early, are not considered a separate trading day. They are rolled into the next trading day for settlement purposes with the exchanges. It is important to keep this in mind for early close trading days.
To see how many trading days you have accumulated, check on Rithmic. If you have not met the minimum trading days, then simply request during the next period, two weeks later.