office, department, division, program, institute, center — Lowercase when not part of the official name.
see academic departments/offices
on — Do not use before a date or day of the week. Exception: when its absence would cause confusion.
The workshop was held Monday.
The speaker will arrive July 1.
On Sept. 7, the office will close for the holiday.
Margaret called Ted on Tuesday.
online — not on-line or on line