I'm glad you mentioned this, David!
So let me clarify:
I like to post the challenge the night before the actual challenge day. For example, Thursday's challenge is posted on Wednesday night. This way, for those in Australia, it is already Thursday, and by posting it later at night, those in the US may not see it until the following morning, which would be Thursday. I can also post it on Thursday in US and assume that everyone else is used to this time difference, if this is confusing.
Each challenge runs for a month as a single conversation so that everyone will have a chance to follow it and post their entries. I'll keep updating the first post in that conversation weekly, featuring the best of last week's entries.
Unfortunately, I started the challenge on the last week of January, so this week I had to start a new one for February.
I'm open to any and all ideas on how to make this process less confusing given the current limitations of Cake, which we designed for conversations instead of challenges. 😀