One cause of daytime fatigue

• Fatigue caused by flying to a distant time zone
• Difficulty adjusting after a long flight: 2 wds
• Travel bummer
• Air travel fatigue
• It's best cured one day per time zone, it's said
• Fatigue after a long-haul flight
• Globe-trotter's problem
• Feeling you get when you're out of time
• Circadian dysrhythmia

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of jet lag English)