始業

1. Origins, structure, and basic meaning

• Structure: In 始業 (しぎょう), begin 始 and work 業 combine to denote the start of work or class.
• Basic usage: 始業 denotes the beginning of a workday or classes, or the time at which they begin.

2. Common pitfalls and similar expressions

• Start of work or classes
  • 始業の can modify a time, bell, or preparation; it is not the founding of the organization itself.