Fix #185 - tighten up adjustment of reminder dates implied to be tomorrow

[yunruse]

If only a time is provided, but it is in the past, assume tomorrow. For example, if it is currently noon but a user states "8am". This fixes:

• #185

In addition, if a reminder is placed in the past with an explicit year (e.g. it is June 2024 and the user provides "Feb 2 2024"), the date is not overridden with the next year. (Bit of an obscure fix, but it didn't hurt to add while I was in the area!)