Monday, 1st week of 2016 => Monday, Jan 4th, 2016
Thursday, 7th week of 2016 => Thursday, Feb 18th, 2016
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Monday, 1st week of 2016 => Monday, Jan 4th, 2016
Thursday, 7th week of 2016 => Thursday, Feb 18th, 2016
Output for 5.0.0 - 5.0.5
Monday, 1st week of 2016 => Monday, Dec 28th, 2015
Thursday, 7th week of 2016 => Thursday, Feb 11th, 2016
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Monday, 1st week of 2016 => Thursday, Jan 1st, 1970
Thursday, 7th week of 2016 => Thursday, Jan 1st, 1970