From: General Manager
To: Departmental Heads

"On Friday evening at 5 p.m., Halley's Comet will be visible in this area, an event which occurs only once every 76 years. Please have the employees assemble in the park area outside the building and I will explain this rare phenomenon to them.

In case of rain, we will not be able to see anything, so assemble the employees in the canteen and I will show them a film of it."