That is the joint open calendar of all the www.almatyhiking.kz community. You can effectively book a tour simply creating an event here. You can also invite your friends by entering their emails in the [guests] field. Don't forget to leave your actual contacts, number of tourists, desired destination and other relevant details.

Also you can join to existing group (or initiate it) in case you're solo traveler and looking for a group to split the costs. Create similar event or simply contact the event author or almatyhikingkz@gmail.com.

Make sure to add almatyhikingkz@gmail.com to the field [add a friend's calendar] to see all other events coming.

The main point is to pool together all solo travelers and make a costs reasonable.
The more tourists - the less costly it will be per person!

To create an event, go to your https://calendar.google.com account and create an event. Then click on your event - window pops-up - choose [options] - choose [change owner] to almatyhikingkz@gmail.com. Once approved your event will be visible to everyone.