The answer
Base each cutover on legal ownership, possession, contract, lawyer adjustments, insurer requirements and continued property protection, not the household's travel date alone. A seller or remote owner may need heat, water, insurance, tax and condo service after leaving. The City provides separate utility and TIPP account processes.
Calgary-specific context
Premature water, heat or payment cancellation can create damage, penalties or closing problems.
What to do next
Assign every account an owner, confirmed end or change date, final reading, proof and fallback.
Verify before relying
Official sources for this topic
These sources explain the rules and records relevant to this topic. Check the current requirements for your property.
Check the current information at the linked source. Ask the appropriate professional how it applies to your property.
Important
This is general information, not legal advice. Speak with a qualified lawyer about your specific situation.