Is natural and common to use "will" for official arrangements and scheduled events? For example:
The meeting will start at 9 o'clock.
My vacation will start on December 21st.
The bus will leave at 8 o'clock.
Would the meaning of the sentences change somehow if will be replaced with the simple present? For example:
The meeting starts at 9 o'clock.
My vacation starts on December 21st.
The bus leaves at 8 o'clock.
If the meaning of the sentences don't change at all, then which is more common?