Mr Crosbie said many members of the Bethlehem College community were still also away on holiday before the school year began.
"I'm very sure the families will be remembering their loved ones but there will be nothing held at the school," he said.
Laste year the college named its rugby field Johnston's Sports Field in honour of Brian and Grace Johnston who were foundation parents of the school.
Details of what happened on that rainy day in Kenya were disclosed in the college investigation released two months after the crash.
It said that the group had set off from a visit to the Gavalagi High School at 1pm, following a heavy rainstorm.
It was still raining when a pre-arranged change of drivers took place 10 minutes into the journey, with student David Fellows replacing Mr Mmata. A few minutes later, the van rolled into a ditch.
The van, fitted with seats and seatbelts for 15 people, was carrying 17 people when the accident happened, with most not wearing their seatbelts.
Earlier reports detailed how by January 24, 13 of the uninjured and walking wounded had returned home, leaving six recuperating in Kenya until they were well enough to travel.