Choose fewer rules, written clearly
The first year is easier when the plan names the major holidays, exact handoff times, and travel windows instead of trying to solve every future edge case.
Separate emotion from logistics
New traditions can be hard. A clear calendar reduces logistics conflict so the emotional parts are not made worse by confusion.
Preview the whole season
Thanksgiving, winter break, school concerts, travel, and birthdays can overlap. A season view helps parents see conflicts early.