Python error : TypeError: Object of type 'Timestamp' is not JSON serializable'

You can try convert datetime to string:

df['Date'] = df['Date'].astype(str)

Or:

df['Date'] = df['Date'].dt.strftime('%Y-%m-%d %H:%M:%S')

print (df.dtypes)
Id      object
Name    object
Date    object
Type    object
dtype: object

If you get an error TimeStamp has no attribute as "astype(str)", you can try, for example, str(timeseries.index[0]). This will convert the timestamp into a string that can then be serialized.