Calculation of the difference between dates

🧠 Super resumo mental

Duration → small units (hours/minutes)
Period → big units (years/months/days)

✅ Duration

Duration measures time in:

• hours

• minutes

• seconds

It is used with:

• LocalTime

• LocalDateTime

👉 Think of Duration as clock-based time.

Example:

Duration.between(start, end);

It calculates how much time passed between two times.

✅ Period

Period measures time in:

• years

• months

• days

It is used with:

• LocalDate

👉 Think of Period as calendar-based time.

Example:

Period.between(startDate, endDate);

It calculates the difference in years, months, and days.