Selecting rows with a certain weekday in DataFrame in Python

You can get the weekday by df.index.weekday, note that Monday = 0 and Sunday = 6

To select the rows on Monday, you can do

df = df[df.index.weekday==0]

Here "Date" is the column name. Creating new column "weekday"

df["weekday"] = pd.to_datetime(df.Date).dt.dayofweek

From this column you can select any weekday from dataframe

df.loc[df["weekday"] ==6]

Here 6 denotes "Sunday"