Spacetime might be a bit more popular than WhenAvailable. We know about 1 link to it since March 2021 and only 1 link to WhenAvailable. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
No pdfs involved but this site might be useful to you. They have a free and paid tier. When Available. Source: over 2 years ago
How about spacetime.am? A website or tool for time differences and to manage stuff and be able to check stuff. Previously, I tried to make it easier to manage our time zones thingy but then I thought maybe it isn't good. So I looked up and found it. Here's the screenshot link and you can search it up yourself and maybe someone, probably the creator of this maybe. Bye bye for now. Source: about 3 years ago
When2Meet - When2meet helps you find the best time for a group to get together. It is a free survey tool that is quick and easy to use.
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Boomerang Calendar - Smart Calendar Assistant for Gmail | Boomerang Calendar
Every Time Zone - Online tool for keeping up with times around the world.
OnceHub - A scheduling and chatbot solution.
Time Zone Pro - A beautiful world clock for friends, family, clients and more