old_contents: import itertools
  
  import pytz
  
  from babel.dates import format_time
  from pylons import c
  
  
  def pairwise(iterable):
      a, b = itertools.tee(iterable)
      next(b, None)
      return itertools.izip(a, b)
  
  
  def pretty_time(dt):
      display_tz = pytz.timezone(c.liveupdate_event.timezone)
  
      return format_time(
          time=dt,
          tzinfo=display_tz,
          format="HH:mm z",
          locale=c.locale,
      )
  
new_contents: import datetime
  import itertools
  
  import pytz
  
  from babel.dates import format_time, format_datetime
  from pylons import c
  
  
  def pairwise(iterable):
      a, b = itertools.tee(iterable)
      next(b, None)
      return itertools.izip(a, b)
  
  
  def pretty_time(dt):
      display_tz = pytz.timezone(c.liveupdate_event.timezone)
      today = datetime.datetime.now(display_tz).date()
      date = dt.astimezone(display_tz).date()
  
      if date == today:
          return format_time(
              time=dt,
              tzinfo=display_tz,
              format="HH:mm z",
              locale=c.locale,
          )
      elif today - date < datetime.timedelta(days=365):
          return format_datetime(
              datetime=dt,
              tzinfo=display_tz,
              format="dd MMM HH:mm z",
              locale=c.locale,
          )
      else:
          return format_datetime(
              datetime=dt,
              tzinfo=display_tz,
              format="dd MMM YYYY HH:mm z",
              locale=c.locale,
          )
  
subject: Make timestamps more specific as temporal context fades.