The beginning of the apprenticeships can vary, but as far as I know the 1st August is the most common date and applies to many people, myself included. An apprenticeship is a big new chapter in ones life and deserves to be celebrated!
I'd love to see a stamp collection for apprenticeships in different fields such as
  • medical (human and animal) and social
  • craftsmanship
  • commercial and office
  • IT
  • transport and logistics
  • hospitality and tourism
  • agriculture and environment
The stamps could be designed with little tools from each field to represent said field and maybe a diploma to represent the scholarship part of the dual education system.