Before choosing a time, think about where you would like to be photographed, as this affect what the best time to have the session.
In my Hillsborough Studio (near St Martins)? These are scheduled during the day, from around 10am to 3pm. Maximum of about 5 people as my studio is quite small.
On location? Beach, Park, Hills? These are scheduled mostly early morning and evening, for beautiful light. Or when during the day we can find somewhere shady, one good location is at Bottle Lake Forest, where I have a great spot just a minute away from where we can park, and the light is lovely all throughout the day.
At your place? Especially good for elderly people who can't make it out to my studio, I am happy to come to retirement homes etc. Scheduled during the day, around 10am to 3pm.