Practical calculator guides

Short explanations for common work, time and date calculations.

Work hours & overtime

Work-hour results depend on breaks, rounding and the overtime week boundary. TimeToolkit keeps these rules visible rather than silently guessing.

Dates & business days

Calendar-day differences and business-day counts answer different questions. Business-day results in this build use your weekend pattern and entered holidays.

Time zones & DST

A meeting duration is treated as elapsed time. Around daylight-saving transitions, a local clock time can be missing or can occur twice.