import re


def strip_timezone_name(timestring: str) -> str:
    """Removes extra timezone name at the end. eg: "-0800 (PST)" -> "-0800" """
    pattern = r"([+]|[-])([0-9]{4})[ ]([(]([a-zA-Z]{3,4})[)]|([a-zA-Z]{3,4}))"
    if re.search(pattern, timestring) is None:
        return timestring

    split = timestring.split(" ")
    split.pop()
    return " ".join(split)