Qtum Calendar: Release Schedule, Listings, Hard Fork, Halving

During the whole time of Qtum monitoring, 100 events were added:

22 exchange events

19 AMA sessions

9 updates

8 events related to earnings

8 releases

8 hard forks

6 general events

5 meetups

5 events related to testing of new functions

4 branding events

2 conference participations

2 contests

2 partnerships

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