Daylight Saving Time is, in some cases, signified by different labels depending on the time of year. For example, Daylight Saving Time in The United States uses the following:
Time Zone Standard Time Daylight Saving Time
Eastern Time Zone EST (UTC-5) EDT (UTC-4)
Central Time Zone CST (UTC-6) CDT (UTC-5)
Mountain Time Zone MST (UTC-7) MDT (UTC-6)
Pacific Time Zone PST (UTC-8) PDT (UTC-7)
Alaska Time Zone AKST (UTC-9) AKDT (UTC-8)
Hawaii–Aleutian Time Zone HAST (UTC-10) HADT (UTC-9)
Thus you can indicate that a particular event happens at 1PM EST / 2PM EDT. But, you really shouldn't.
... and I am not going to remember to change the description.
What you are doing is putting the burden of memory on your users. You're making the users do the work because you don't want to. Be it a notification in your reminder app, or a little extra code to automatically flip the date, it should not be your user's responsibility remember if it is currently +1 or +2.
User Experience is about their experience. It is about taking the extra step to ensure that your have externalized the memory requirements of your users. They shouldn't have to remember, they should just be able to look at their watch and know when to arrive.