Turning point
Else clues• 50th anniversary, for example
• End of an era, e.g.
• Event worth celebrating
• Important event
• Landmark
• Landmark event
• Notable achievement
• Rite of passage
• Rite of passage, e.g.
• Significan event
• Stone post at side of a road to show distances
• A significant event in your life (or in a project)