def format_date(
        self,
        date: Union[int, float, datetime.datetime],
        gmt_offset: int = 0,
        relative: bool = True,
        shorter: bool = False,
        full_format: bool = False,
    ) -> str:
        """Formats the given date (which should be GMT).

        By default, we return a relative time (e.g., "2 minutes ago"). You
        can return an absolute date string with ``relative=False``.

        You can force a full format date ("July 10, 1980") with
        ``full_format=True``.

        This method is primarily intended for dates in the past.
        For dates in the future, we fall back to full format.
        """
        if isinstance(date, (int, float)):
            date = datetime.datetime.utcfromtimestamp(date)
        now = datetime.datetime.utcnow()
        if date > now:
            if relative and (date - now).seconds < 60:
                # Due to click skew, things are some things slightly
                # in the future. Round timestamps in the immediate
                # future down to now in relative mode.
                date = now
            else:
                # Otherwise, future dates always use the full format.
                full_format = True
        local_date = date - datetime.timedelta(minutes=gmt_offset)
        local_now = now - datetime.timedelta(minutes=gmt_offset)
        local_yesterday = local_now - datetime.timedelta(hours=24)
        difference = now - date
        seconds = difference.seconds
        days = difference.days

        _ = self.translate
        format = None
        if not full_format:
            if relative and days == 0:
                if seconds < 50:
                    return _("1 second ago", "%(seconds)d seconds ago", seconds) % {
                        "seconds": seconds
                    }

                if seconds < 50 * 60:
                    minutes = round(seconds / 60.0)
                    return _("1 minute ago", "%(minutes)d minutes ago", minutes) % {
                        "minutes": minutes
                    }

                hours = round(seconds / (60.0 * 60))
                return _("1 hour ago", "%(hours)d hours ago", hours) % {"hours": hours}

            if days == 0:
                format = _("%(time)s")
            elif days == 1 and local_date.day == local_yesterday.day and relative:
                format = _("yesterday") if shorter else _("yesterday at %(time)s")
            elif days < 5:
                format = _("%(weekday)s") if shorter else _("%(weekday)s at %(time)s")
            elif days < 334:  # 11mo, since confusing for same month last year
                format = (
                    _("%(month_name)s %(day)s")
                    if shorter
                    else _("%(month_name)s %(day)s at %(time)s")
                )

        if format is None:
            format = (
                _("%(month_name)s %(day)s, %(year)s")
                if shorter
                else _("%(month_name)s %(day)s, %(year)s at %(time)s")
            )

        tfhour_clock = self.code not in ("en", "en_US", "zh_CN")
        if tfhour_clock:
            str_time = "%d:%02d" % (local_date.hour, local_date.minute)
        elif self.code == "zh_CN":
            str_time = "%s%d:%02d" % (
                (u"\u4e0a\u5348", u"\u4e0b\u5348")[local_date.hour >= 12],
                local_date.hour % 12 or 12,
                local_date.minute,
            )
        else:
            str_time = "%d:%02d %s" % (
                local_date.hour % 12 or 12,
                local_date.minute,
                ("am", "pm")[local_date.hour >= 12],
            )

        return format % {
            "month_name": self._months[local_date.month - 1],
            "weekday": self._weekdays[local_date.weekday()],
            "day": str(local_date.day),
            "year": str(local_date.year),
            "time": str_time,
        }
Formats the given date (which should be GMT).

        By default, we return a relative time (e.g., "2 minutes ago"). You
        can return an absolute date string with ``relative=False``.

        You can force a full format date ("July 10, 1980") with
        ``full_format=True``.

        This method is primarily intended for dates in the past.
        For dates in the future, we fall back to full format.