A probably known easier way is to see the standardized changelog of the package. There should be a date in each version.
Yao Wei (This email is sent from a phone; sorry for HTML email if it happens.) > On Aug 1, 2019, at 09:27, 積丹尼 Dan Jacobson <jida...@jidanni.org> wrote: > > Package: www.debian.org > > Let's examine how extremely hard it is for a user to squeeze update date > of a package he is thinking of installing out of the Debian system. > > First of all update dates are not part of any Package* file. So forget > apt, etc. > > Now we must turn to the web. > > Case in point: > > "Should we install webext-ublock-origin, or get it from the Chrome web > store. I know, let's see which is newer!" #933608 > > https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm > says says "Updated July 25, 2019" > > That was simple. > > OK, let's turn to Debian. > > https://www.google.com/search?q=webext-ublock-origin leads to > https://packages.debian.org/sid/web/webext-ublock-origin > from where we must know to click on "all", > https://packages.debian.org/sid/all/webext-ublock-origin/download > > There we see > More information on webext-ublock-origin_1.19.0+dfsg-2_all.deb: > Exact Size 1617728 Byte (1.5 MByte) > MD5 checksum 190c7c66089925f72489624d700c34a0 > SHA1 checksum Not Available > SHA256 checksum > bf50b4180ba0daddd720b5ce1702a315ed7743cc749ebb3cc131fe60dcc648c9 > > but Date is still not included. > > So we must copy a link, and run HEAD on it, > > $ HEAD > http://ftp.us.debian.org/debian/pool/main/u/ublock-origin/webext-ublock-origin_1.19.0+dfsg-2_all.deb > 200 OK > Connection: close > Date: Thu, 01 Aug 2019 01:17:03 GMT > Accept-Ranges: bytes > ETag: "5d22808b-18af40" > Server: nginx/1.13.6 > Content-Length: 1617728 > Content-Type: application/octet-stream > Last-Modified: Sun, 07 Jul 2019 23:30:19 GMT > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Ah, finally! > > But let's say we are not as smart. > > So we must shorten the link: > > http://ftp.us.debian.org/debian/pool/main/u/ublock-origin/ > > Then click Last Modified (twice), then look for the file we want... >