CREATE TABLE fires (fire_year DECIMAL, discovery_date DECIMAL, discovery_doy DECIMAL, discovery_time TEXT, stat_cause_code DECIMAL, stat_cause_descr TEXT, cont_date TEXT, cont_doy TEXT, cont_time TEXT, fire_size DECIMAL, fire_size_class TEXT, latitude DECIMAL, longitude DECIMAL, owner_code DECIMAL, owner_descr TEXT, state TEXT, county TEXT, fips_code TEXT, fips_name TEXT)

Which time of day has the most wildfires?
SELECT discovery_time FROM fires GROUP BY discovery_time ORDER BY COUNT(*) DESC LIMIT 1
SELECT "discovery_time" FROM "fires" GROUP BY "discovery_time" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1