today = timestamp or datetime.now()
context_today = None
tz_name = record._context.get('tz') or record.env.user.tz
if tz_name:
    try:
        today_utc = pytz.timezone('UTC').localize(today, is_dst=False)  # UTC = no DST
        context_today = today_utc.astimezone(pytz.timezone(tz_name))
    except Exception:
        _logger.debug("failed to compute context/client-specific today date, using UTC value for `today`",
                      exc_info=True)
return (context_today or today).date()