> For the complete documentation index, see [llms.txt](https://docs.efento.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.efento.io/nb-iot-loggers/device-settings/device-time.md).

# Device time

In order to operate properly, Efento NB-IoT logger has to set its internal time. After successful network registration, the device will automatically fetch the time from the network. From now on, all the measurements taken by the device will have the timestamp assigned. If for any reason the device is not able to fetch the time from the network, it will try to connect to the Efento Cloud platform and get time from the server. The device automatically updates its time settings after each confirmable message sent to the server. The current time settings are provided by the server in the ACK.

{% hint style="warning" %}
**If the logger sends the data to the customer's server, each ACK sent to a confirmable message should contain the current timestamp. The timestamp will be used by the device to update its internal clock.**
{% endhint %}


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