I read up on using the email scheduling function in Zoho Mail

https://www.zoho.com/mail/help/schedule-send.html 

When I select a specific date and time - what time zone is that in?

Reason for asking is I wrote 2 emails at night and scheduled them to send at 8am the next morning

- they did not send

This was on PC using Chrome - I did close Chrome after setting the schedule, and didn't re-open it until after the scheduled send time (actually checked them on the Zoho mail iPhone app)

Thanks, in advance

Ross