The first match of the UEFA European Championship typically lasts for 90 minutes, divided into two halves of 45 minutes each. In addition to the regular playing time, there is usually added time at the end of each half to compensate for stoppages in play, such as injuries or substitutions. This added time is known as "injury time" or "stoppage time" and is determined by the referee based on the events that occurred during the half.
If the match ends in a draw during the group stage, it may go into extra time, consisting of two periods of 15 minutes each. If the score is still tied after extra time, the match may be decided by a penalty shootout.
It is important to note that the duration of a football match can vary depending on the specific tournament regulations and any additional time allocated by the referee.