With Daylight Saving Time Worldwide API, developers can manage dates, times and zone changes in multiple countries. This service is featured in Time and Date, a company based in Norway that informs users about the world clock, calendars, weather, astronomy and time zones. Particularly with this company, developers can create applications at no cost, but if the goal is to use over 10,000 requests, they could purchase a package available on the site. With this API, partners can retrieve information of recognized parameters such as year, country, lang, listplaces, and timechanges. They also can access responses and examples in JSON and XML protocols.