The effect of public holiday on a time series of daily counts
     
    
    Usage
    add_holiday_effect(data, holiday_data, holiday_effect = 2)
 
    
    Arguments
- data
- A csfmt_rds data object 
- holiday_data
- dates 
- holiday_effect
- Ending date of the simulation period. 
 
    
    Value
    A csfmt_rts_data_v1, data.table containing