title: Python get Start of Week According to Timezone/Locale
body: <p>I want to know what is the start of the week, but it should be according to a specific time zone or locale.</p>
  
  <p>I can retrieve the datetime of the start of the day like this</p>
  
  <pre><code>now = datetime.now()
  weekday = now.weekday()   # 0 if it is Monday
  start_of_week = now.replace(day=now.day-weekday)
  </code></pre>
  
  <p>But if I am in a country where the start of the week is Sunday (for example timezone 'Asia/Tel_Aviv') this won't work. </p>
  
  <p>Is there a way to get the start of the week according to timezone or locale with pytz or any other library?</p>