Read the passage and answer the question.
PASSAGE (P16): A youth group organized a neighbourhood clean-up on the first Saturday of the month. They gathered at 8:00 a.m. and were divided into four teams. One team cleared the playground, another swept the roadside, a third collected plastic waste, and the last team arranged the rubbish for pickup. By noon, the coordinator thanked everyone and announced that the next clean-up would focus on the drainage channels.
QUESTION: When did the group organize the clean-up?
Select the ONE best answer from the options panel.