Manipulating time
Two functions, time and date, do all date and time queries in Lua.
local now = os.time()
print(now)
local timestamp = os.time({year=2021, month=9, day=15, hour=3, minute=4})
print(timestamp)
t = os.date('*t', timestamp)
print(t.year)
print(t.hour)
1641046800
1631664000
2021
3
Formatting
print(os.date("today is %A, in %B"))
today is Saturday, in January
All formatting tags:
%a abbreviated weekday name (e.g., Wed)
%A full weekday name (e.g., Wednesday)
%b abbreviated month name (e.g., Sep)
%B full month name (e.g., September)
%c date and time (e.g., 09/16/98 23:48:10)
%d day of the month (16) [01-31]
%H hour, using a 24-hour clock (23) [00-23]
%I hour, using a 12-hour clock (11) [01-12]
%M minute (48) [00-59]
%m month (09) [01-12]
%p either "am" or "pm" (pm)
%S second (10) [00-61]
%w weekday (3) [0-6 = Sunday-Saturday]
%x date (e.g., 09/16/98)
%X time (e.g., 23:48:10)
%Y full year (1998)
%y two-digit year (98) [00-99]
%% the character `%´