Dapps are listed through governance on curate.thedapplist.com. Proposals are created by Hunters. They hunt for new Web3 projects/dapps. After a proposal is created, it goes into a voting cycle of 7 days in the following week starting on Monday. Voting goes on until Sunday midnight (as per UTC).
Basis votes, top 5 voted Dapps/Projects are listed on thedapplist.com every Monday. Hunting is not time-bound, you can create a proposal at any time of the week.