Oops, it doesn't look like 'and international efforts to combat climate change from day' is a national day..

Other days

kale

Kale Day
donate your hair

Donate Your Hair Day
aloxolt

Aloxolt Day
my little pony

My Little Pony Day
stress awareness

Stress Awareness Day
one

One Day
self appreciation

Self Appreciation Day
self care

Self Care Day
pampering

Pampering Day
get funky

Get Funky Day