What signifies the start of the second half in a match?

The start of the second half in a match is signified by a whistle blast followed by a kickoff by the team that did not start the first half. This procedure is consistent with the Laws of the Game set by the International Football Association Board (IFAB). The kickoff allows the game to resume play in a fair manner, ensuring that both teams have an opportunity to start with possession at different halves of the match.

A whistle blast serves as the official signal that play is beginning again, which is crucial for maintaining order and ensuring that players are ready. The team that did not start the first half takes the kickoff, reinforcing the concept of alternating possession and maintaining the competitive balance throughout the match.