Date on each item within a slot

I would find it very useful to also have an optional date/time associated with each item in a slot where each item will notify me if I set a date/time on it.

When traveling, I could see each slot being a city I’m going to visit. Each item within that slot would be things like: top 10 things to see in that city videos on YouTube, links to information about sites i plan to see there, weather forecast sites for that city, etc. then i could schedule these to notify me with enough lead time to take appropriate action.

If I'm waiting for payday to buy stuff, I can be notified the day after payday with the link to buy an item.

This type of scenario exists for any scheduled event where content is most useful if it is brought forward to me at the right time. As I'm researching stuff, being able to have useful content tell me to look at it at the right time in the future is a huge benefit.