Strange behaviour of st.dataframe at rendering datetime variables on Heroku

[vnikoofard]

Hi,

I’m using the Heroku to deploy my code. On my local machine everything is fine. But on Heroku, the st.dataframe (also st.write) does show a strange behavior rendering the datetime column of my dataframe. It starts the dates from one day before the first date in the dataset. Interesting that when I use the df.iloc[0] the result is correct. Check the “Data Negócio” column at below image:

[Adrien_Treuille]

Shot in the dark here, but could this be a timezone issue? (Is the Heroku instance in a different timezone from your personal computer? Might there be some dependence there?)

Thank you for using Streamlit!

[vnikoofard]

Thanks very much for your attention.
In fact, I was suspect of it. For this reason I checked both st.dataframe(df) and st.dataframe(df.iloc[0]) together, as in the image on my question. As you can see, the results are different. So it seems that the Heroku isn’t responsible for this issue. Maybe st.dataframe treats a Dataframe and a Series in a different way.