*3.3. Historical Electric Energy Consumption*

Historical electric energy consumption is a good indicator of electric usage forecasts as it shows electricity usage patterns and trends [42]. We consider a specific time for 10 different days to reflect historical electric energy consumption. Herein, the historical electric energy consumption we considered included the last six days and the same day of the previous four weeks. For instance, if the forecast time is Saturday, 29 June 2019, 4 p.m., we use historical load data measured at 4 p.m. from 1, 8, 15, 22, 23, 24, 25, 26, 27, and 28 June. However, the weekday and weekend load patterns could be different. To reflect trends through historical load data more accurately, we use additional data that indicate whether the ten days used as input variables were holidays or not.
