title: How to convert from UTC to EST in python?
body: <p><strong>Issue:</strong> I have a python dataframe column <code>df['startDate']</code> that is a series of UTC timestamps. I'm trying to convert them all to Eastern (EST) timestamps in a new column <code>dt['startDateEST']</code>. For some reason everything I've tried outputs <code>df['startDateEST']</code> as an exact copy of <code>df['startDate']</code> (timestamps remain in UTC). Please help!</p>
  <p><strong>I've tried:</strong></p>
  <pre><code>df['startDateEST'] = pd.Series(df['startDate']).dt.tz_convert(tz = 'American/New_York')
  
  df['startDateEST'] = pd.Series(df['startDate']).dt.tz_convert(tz = 'US/Eastern')
    
  df['startDateEST'] = df['startDate'].map(lambda x: pd.to_datetime(x, yearfirst=True).tz_convert('American/New_York'))
  
  df['startDate'] = pd.to_datetime(df['startDate'], utc=True) 
  df['startDateEST'] = pd.Series(df['startDate']).dt.tz_convert(tz = 'American/New_York')
  </code></pre>