A half day out of office names the half you are away and the exact time you are back: "I'm offline this afternoon and back online at 9am tomorrow. For anything urgent, please contact [name] at [email]." Five versions for common half days are below.
Updated 2026 · Reviewed and rewritten for clarity
Quick answer
Half-day OOO messages should give the exact return time ("back online at 2pm"), one backup contact for genuinely urgent matters, and no over-explaining. "A personal appointment" is enough of a reason.
Half day at a glance
Situation
Include
Morning out
Back-online time today, backup contact
Afternoon out
Return time tomorrow, backup contact
Appointment
"Personal appointment" and the return time; no medical detail
Focus block
When you will check email next
→ The mechanical fix
Even half-day absences need routing.
Some emergencies don't wait 4 hours. Routing handles them while you're at the dentist.
'Hi, I'm offline this morning and will be back online by [time]. For urgent matters during this window, please contact [backup name] at [email]. For non-urgent, I'll respond this afternoon.'
Template 2: Afternoon out
'Hi, I'm offline this afternoon and will be back online tomorrow morning at [time]. For urgent matters tonight, please contact [backup name] at [email] / [phone]. For non-urgent, I'll respond first thing tomorrow.'
Template 3: Doctor appointment
'Hi, I'm at a medical appointment this [morning/afternoon] and will be back online by [time]. For urgent matters, please contact [backup] at [email]. Otherwise I'll respond when I'm back.'
Template 4: School pickup / family obligation
'Hi, I'm offline for a family obligation from [start] to [end]. I'll respond when I'm back. For urgent matters: [backup] at [email].'
Template 5: Focus block (no apology)
'Hi, I'm in a focus block until [time]. Email is checked at [check-in time] and [check-in time]. For urgent matters: [backup] / [routing URL].'