Absence note to the school (from parent or guardian) making the school aware of your involvement in the absence of your child for a more extended period due to travel. The travel arrangements are not expected to have any impact on long term attendence or performance.
Note: the school should be advised of an expected extended absence as soon as you become aware of it, like when your travel arrangements have been finalised. Nevertheless, this letter would still be an appropriate follow up.
Absence letter - school (travel) (extended period) no impact.