Here's why:
* "On" implies that the item is part of a list or a plan.
* "In" implies something is contained within something else, which doesn't fit the context of an agenda.
Therefore, the correct phrase is "schedule it on your agenda".
Here's why:
* "On" implies that the item is part of a list or a plan.
* "In" implies something is contained within something else, which doesn't fit the context of an agenda.
Therefore, the correct phrase is "schedule it on your agenda".