Is there a word for something which will run before and after an event?

If concurrent means two things running at the same time, is there a single word for something which will occur before and after an event?

E.g.
Running concurrently with the show will be a bar open for refreshments. /
The bar will be open [before and after] the show for refreshments.

Answer

Pre and Post seem to be the most used prefix/suffix.

“Pre-launch and Post-launch parties.”

Attribution
Source : Link , Question Author : Gavin D , Answer Author : Gurpreet K Sekhon

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