added page on BrainHack Global

Author: tclose

global.md

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+---
+layout: page
+title: BrainHack Global
+---
+
+# BrainHack Global
+
+BrainHack Global (BHG) is a hackathon consisting of multiple local events in different
+regions around the world run towards the end of the year November ~ December. A central
+project submission website (see [BrainHack Global 2023](https://brainhack.org/global2023/projects/\))
+can be used to coordinate projects across event sites. If you are planning to host a
+hackathon in your region around this time and would like to loosely coordinate with
+other hackathons going on at the same time please add your event to the
+[BrainHack Global 2024 events list](https://brainhack.org/global2024/events/).