launchtime

noun
UK /ˈlɔːntʃ.taɪm/
US /ˈlɑːntʃ.taɪm/

The time when a rocket or boat starts to go.

Everyone counted down to launchtime and cheered when the rocket flew up.


OTHER MEANINGS

2. The time when a new product or service is first made available.

The team worked all night before the app's launchtime.

3. The moment a boat or ship is put into the water.

Crowds gathered at the harbor for the ship's launchtime.

4. The scheduled time for starting an activity or event.

We set launchtime for the festival at noon.