Air Traffic Controllers all over the world celebrate " International Air Traffic Controllers Day" on the 20th of October every year.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/eco-friendly-air-traffic-control-service-initiated-sri-lanka-international-air-traffic
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/island-sri-lanka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sri-lanka
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-transport
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-harvesting
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-management
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-efficiency
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control