Amazon's Echo digital assistant is one of its first bona fide hardware successes since the debut of the Kindle, and now the company is extending the device's reach deeper into Google's territory.

Now the helpful little voice-controlled helper can also add events to your Google Calendar.

See also: You can now order an Uber with Amazon Echo

Simply saying, "Add an event to my calendar," or, for example, saying, "Add Jennifer's party to my calendar for Tuesday at 10 p.m." will now add those events via the Alexa software agent.

Details were revealed in an update to Amazon's website earlier this week.

Before using the feature, you'll first need to enable the "link Google Calendar account" in your Alexa app.

Although Alexa has been able to read your Google Calendar to you for a while now, this event creation feature raises the stakes. Specifically, it means that Alexa is beginning to encroach on Google's Android territory, threatening to make the company's "OK Google" digital assistant a mere also-ran for Amazon users who also happen to use Google services.

The Amazon Echo was initially seen as something to help you shop and consume content offered by Amazon, but scheduling your day has little to do (directly) with commerce. So this, along with added features like ordering an Uber from Echo, hints at more non-Amazon ecommerce Echo developments to come.

However, Google isn't sitting on the sidelines while this happens. Recent reports claim that Google is working on its own Amazon Echo competitor.

Meanwhile, the clock has officially started ticking on what other Google digital assistant features Amazon Echo will try to take over in the coming months.