> ## Documentation Index
> Fetch the complete documentation index at: https://docs.teasy.link/api-v1/llms.txt
> Use this file to discover all available pages before exploring further.

# Dates and time

> How data and time live in our API

In our API, dates and times can be provided in two possible formats: ISO 8601 in UTC and UTC milliseconds. Most often, you will encounter the first format:

```json theme={null}
{ "created_at": "2026-08-21T10:00:00Z" }
```

However, there is currently one exception in the project: analytics requests for a specific time range. Analytics is the only place where we require UTC milliseconds from you to specify the time range:

```
?start_date=1755734400000&end_date=1756339200000&timezone=Europe/Belgrade
```