cachedate="$(
# Parse the allowable date formats from Section 3.3.1 of
# https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html
cachedate="$(
# Parse the allowable date formats from Section 3.3.1 of
# https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html