There is some problem. Developing a CRM system for conducting business processes of a company. We are engaged in the repair of technology, use
frontend - Backbone
backend - yii2
It is assumed that this program in the form of a site will be leased to our partners throughout Russia. So timezone is different in time. Suppose if I work in the MSC and I have my own time zone - I receive all orders with a specific date in crm, but if I enter the same CRM system from another point of the country, I will see a different date and time.
How to be? How can I correctly implement the timezone in my case?