It is one of two mourning days in Turkmenistan (the other being Memorial Day).

Entity and relation annotations:
id: 0
type: entity
value: text: Memorial Day
labels: <Event>
id: 1
type: entity
value: text: Turkmenistan
labels: <Location>
type: relation
to_id: 1
labels: Event:Occurs_at:Location
from_id: 0