select all fields from call_report where call_date is in this month or in last month

T * FROM call_report WHERE call_date BETWEEN '2018-01-01' AND '2018-01-31';

I want to get the sum of the call_time column for each day in the date range. I tried the following query but it doesn't work.
SELECT DATE(call_date) AS date, SUM(call_time) AS total_time
FROM call_report
WHERE call_date BETWEEN '2018-01-01'