Daylight saving time (DST), also known as summer time or daylight savings time, is a widely used system of adjusting the official local time forward, usually by one hour from its official standard time, for the summer months. This is intended to provide a better match between the hours of daylight and the active hours of work and school. The “saved” daylight is spent on evening activities which get more daylight, rather than being “wasted” while people sleep past dawn.
Some countries like Chile, Brazil and Egypt adopt a variable Daylight Saving Time dates (DST). The initial and end dates change every year following the government decision.
As a result, users in these countries experience inconvenience with their Outlook meetings and appointments being off by one hour. Every year, we receive numerous calls from Stations reporting such behavior.
I will explain why the issue happens as well as how to minimize the impact for Outlook users.
Please refer to this document :