1. Take package from https://framagit.org/framasoft/framadate/framadate/-/releases (download the release zip as it has vendor folder included)
2. Refer https://framagit.org/framasoft/framadate/framadate/wikis/install/Configure for manual installation. ( Create .htaccess and .htpasswd as mentioned in installation )
Follow the first standard procedure, then Secure admin section, execute the below mentioned command to generate password :
/usr/local/apps/apache/bin/htpasswd -bc /{soft_path}/admin/.htpasswd username password
4. rename htaccess.txt to .htaccess in order to create polls
5. PHP REQUIREMENT LINK: https://framagit.org/framasoft/framadate/framadate/wikis/Install/Requirements
6. Remove .git folder from zip. It's not needed.
7. Keep SMTP details 'use_smtp' => false, in config.php. 
8. Check for release date here :
https://framagit.org/framasoft/framadate/framadate/releases