How to select a row for every location for every day using SQL?

I have a database where some forecasts for two locations are stored. For every location there are forecasts for 3 days and for every day there are multiple forecasts every hour. I want to select the latest forecast for each location for every day. The location is saved as "location", each day is saved as "applicable_date" and for every day there is a forecast each hour saved as "created". I am trying something like this but does not work:

SELECT * FROM (
    SELECT * FROM `forecast` GROUP BY location
) GROUP BY applicable_date 
ORDER BY created DESC 
LIMIT 1

>Solution :

SELECT location, 
       CAST(created AS DATE) `date`, 
-- or  applicable_date `date`,
       MAX(created) last_datetime
FROM forecast
GROUP BY 1, 2;