I've just found out that tomorrow, 5 May, is World Hand Hygiene Day with the hashtag: #handhygiene. I didn't know about that - is it fairly new?
See here:
www.who.int/infection-prevention/campaig...n-hands/5may2018/en/

Health care-associated infections, infections acquired during health care delivery, are common and are a risk factor for developing sepsis but we can prevent this. Effective hand hygiene plays a key role. On world hand hygiene day (5 May), the focus for everyone should be on prevention of sepsis in health care.

It's interesting that we have a World Hand Hygiene Day on 5 May and a Global Handwashing Day on 15 October (same topic, two different days?). For Global Handwashing Day we have a good Wikipedia article here:
en.wikipedia.org/wiki/Global_Handwashing_Day

If anyone can tell me more about World Hand Hygiene Day (e.g. how long has it been around for? Is it an official UN day?) I would be all ears. Actually it is not in this list: www.un.org/en/sections/observances/international-days/ So perhaps it is just a day celebrated by WHO but not be the UN.

Regards,
Elisabeth