from datetime import datetime
import pytz


def get_time_string(df):
    """
    Provide information on the time of the last update
    """
    dt_string = datetime.now(pytz.timezone('US/Eastern')).strftime("%d/%m/%Y %H:%M").replace('/', '-')
    last_updated = f"Data last accessed at: {dt_string}. Latest case reported on: {df.iloc[-1]['date_report']}."
    return last_updated