Because this is a module, it actually executes on each page load, meaning you can avoid the caching issues that sometimes arise from determining the current time using a template (i.e. <nowiki>{{#time:Y-m-d h:i:s|now}}</nowiki>, which returns "").
You can format its output using other templates or modules.
<nowiki>{{</nowiki>#invoke:now|main<nowiki>}}</nowiki>