There currently isn't a dataset which includes upcoming earnings report dates similar to what was included in the EventVestor data. There is the Factset Estimates - Actuals but that only includes actual (past) dates. Additionally, FactSet data has a 1 year holdout so it's not possible to get current results.

There are some online sources for this data. Yahoo has an earnings release calendar (https://finance.yahoo.com/calendar/earnings/) which may help. Not sure if historical data is available. If so, it may be able to be put into a self serve data feed?

Ok, past earnings are fine, too.

so here's a little prototype of what I want, the main problem so far is that I have to input the exact time to find the publication date, not just
YYYY-MM-DD but the whole YYYY-MM-DD hours-minutes-seconds. The latter might be good, too, but at least I need to find a way to have it as a range like starting date - end date

#Function: earnings report on a specific date  
#Input: Exchange; Date  
#Output: Stock tickers

from quantopian.pipeline import Pipeline  
from quantopian.pipeline.data.factset.estimates import Actuals  
from quantopian.pipeline.domain import US_EQUITIES  
from quantopian.research import run_pipeline


def make_pipeline():  
    pipe = Pipeline()  

    # Create our slice for the last actual earnings data  
    fq0_eps_act = fe.Actuals.slice('EPS', 'qf', 0)  
    publication_date = fq0_eps_act.publication_date.latest  
    return Pipeline(  
        columns={  
            'publication_date' : publication_date  
        },  
    )

pipeline_output = run_pipeline(  
    make_pipeline(),  
    start_date='2017-10-23',  
    end_date='2017-10-23'  
)

#asset_list = pipeline_output.index.levels[1].unique()

pipeline_output  
pipeline_output['publication_date']=='2017-07-24 12:30:00'  

that yields:

Pipeline Execution Time: 0.17 Seconds  
2017-10-23 00:00:00+00:00  Equity(2 [ARNC])             True  
                           Equity(21 [AAME])           False  
                           Equity(24 [AAPL])           False  
                           Equity(25 [ARNC_PR])        False  
                           Equity(31 [ABAX])           False  
                           Equity(39 [DDC])            False  
                           Equity(41 [ARCB])           False  
                           Equity(52 [ABM])            False  
                           Equity(53 [ABMD])           False  
                           Equity(62 [ABT])            False  
                           Equity(64 [GOLD])           False  
                           Equity(66 [AB])             False  
                           Equity(67 [ADSK])           False  
                           Equity(70 [VBF])            False  

Getting closer, but still have problems passing dates between two ...