The countdown pauses. A launch may still fit within the window.
This attempt stops. Another attempt needs a new opportunity.
A new target is published. Check its date, timezone and status.
Example: a 14:15 target held at 14:10 is still uncertain. A later 16:00 target is a revised plan, not proof of a launch.
A target is a plan
Launch opportunities depend on the mission’s timing constraints and suitable conditions. Bad weather can prevent an attempt. The schedule alone does not establish why a particular launch moved.
Follow the recorded explanation
Open the mission page and look for a provider update, weather concern or failure explanation. Spacian shows a previous and new target only when it has a valid recorded change. It does not reconstruct a reason from the countdown.
A hold is not the same as an outcome
A hold pauses an attempt; a scrub ends that attempt. Neither label by itself means the overall mission has failed. The status guide explains the labels used in the schedule.
After a change
Check the new date and its precision, then review your calendar entry. A downloaded calendar file is a one-time copy. A subscribed calendar can receive later changes when your calendar application refreshes it. Keep the mission page as the reference for the latest published target.
Sources & further reading
NASA · Launch windows ↗Explanations are reviewed separately from the live mission schedule. Follow the linked provider for current mission-specific information.