For the Hive Power Up Month challenge, the requirement is to power up at least 1 HIVE or make a 100% Hive Power post every day of the month. This means that you need to act each day, rather than accumulating and powering up a larger amount at once.
Therefore, powering up 30 HIVE in one go at the end of the month won't meet the daily activity requirement for the challenge. The idea is to encourage consistent engagement and growth on the platform throughout the month.