The test before you build anything
Write the description paragraph first, even though it sits below the title on the finished page. Who this hour is for, what they will be able to do afterwards, how long it runs โ if those three lines are hard to write, the topic is not ready, and building the page will not improve it. That paragraph is worth keeping as the topic's real test: an audience line and its outcome belong inside the description, which is copy guests actually read on the page.
One honest note about volume. If you have four topics and one date, resist the temptation to describe them all on the same link. Running a season means a page per session, each with its own address, its own capacity and its own list โ the same shape repeated, which is far quicker the second time because the biographies and the structure already exist.