Format the weekday name for a fixed UTC date.

Weekday Label

weekday_label.lua
local timestamp = 
local weekday = os.date("!%A", timestamp)
print("timestamp=" .. timestamp)
print("weekday=" .. weekday)
local timestamp = 
local weekday = os.date("!%A", timestamp)
print("timestamp=" .. timestamp)
print("weekday=" .. weekday)
local timestamp = 
local weekday = os.date("!%A", timestamp)
print("timestamp=" .. timestamp)
print("weekday=" .. weekday)
weekday Weekday formatting is deterministic here because the timestamp and timezone are fixed.