# Criteria Conditions

## Anniversary

It's quite common to want to filter on a given anniversary.

If you want to specify the anniversary for some "static" date like [Festivus](https://en.wikipedia.org/wiki/Festivus): `dayOfMonth:23` and `month:12`

{% hint style="info" %}
Remember to `and` these together in your definitions.
{% endhint %}

Here is how this might appear when specified in JSON:

```javascript
{
    "conditions": [
        "operator": "and",
        "groups": [
            "operator": "and",
            "conditions": [
                "month:12",
                "dayOfMonth:23"
            ]
        ]
    ]
}
```

## Summer Months

This is a relatively easy recipe, but it's included anyway.

If you want to specify the typical summer months in the northern hemisphere: `months:6,7,8`

If you want to specify the typical summer months in the southern hemisphere: `months:12,1,2`

{% hint style="info" %}
 In addition to the seasons being different between earth's hemispheres, not everyone agrees on which months constitute a given season. 🤓
{% endhint %}