PHP: Convert a Geolocation (Latitude / Longitude Coordinates) to a Timezone identifier

Part of a PHP project I’m working contains a list of sites/buildings. For each site/building we monitor some data, for example its energy usage. We decided that we wanted to generate a daily/weekly/monthly reports of the data, by aggregating the datapoints. As our sites/buildings are spread across the globe – and thus timezones – we […]