545
This is the number of events associated with the International Year of Crystallography and listed on the IYCr Calendar of events. The actual number of initiatives, events and activities organized and carried out to celebrate IYCr2014 is anyway definitely higher than 545!
Therefore, if you have organized an event and this is not listed on the Calendar, please send all details to iycr2014@iucr.org. This will help create a full archive of what IYCr2014 has been.
We are also collecting reports about all events related to IYCr2014. Reports are listed here, and will be included in the final report to the UN. Please send yours to iycr2014@iucr.org