Maybe it was jet lag - whatever that was.
Jet Lag: Jet lag is a temporary sleep disorder in which individuals suffer from sleep disorders such as insomnia or fatigue as a result of air travel across time zones.
It is useful for alleviating jet lag and for depression due to weather conditions.
The symptoms of jet lag vary depending on the individual person and the time difference between the place of departure and the destination.
Our reason for fighting jet lag was that the vicars choral were to sing this anthem this day.