> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blnkfinance.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Time-based condition examples
> Watch DSL examples that use native time functions with created_at.
export const CtaCallout = props => {
const {title, buttonLabel, href, trackingEvent, buttonTarget, rel = "noopener noreferrer", children} = props;
const handleCtaClick = () => {
if (typeof window === "undefined" || !trackingEvent) {
return;
}
try {
window.dispatchEvent(new CustomEvent("blnk:docs-cta", {
detail: {
name: trackingEvent,
href
}
}));
} catch {}
try {
window.posthog?.capture?.(trackingEvent, {
href
});
} catch {}
const gaPayload = {
cta_href: href
};
try {
window.gtag?.("event", trackingEvent, gaPayload);
} catch {}
try {
window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
event: trackingEvent,
...gaPayload
});
} catch {}
};
const isExternal = typeof href === "string" && (/^https?:\/\//i).test(href);
const target = buttonTarget ?? (isExternal ? "_blank" : undefined);
const linkRel = isExternal ? rel : undefined;
return ;
};
Blnk Watch is currently in beta. [Send us a message](mailto:support@blnkfinance.com)
These examples use native time functions such as `hour_of_day(created_at)` and `day_of_week(created_at)`. Watch reads the timestamp from `created_at` on each transaction.
See [Setting conditions](/watch/rules/setting-conditions#time-based-functions) for the full list of time functions and operators.
### Late night transactions
This rule reviews larger transactions that occur late at night. It is useful for flagging activity that lands outside a customer's normal operating window without blocking all after-hours traffic.
```bash LateNightTransactions.ws theme={"system"}
rule LateNightTransactions {
description "Flags large transactions that occur late at night."
when hour_of_day(created_at) >= 21
and amount > 1000
then review
score 0.6
reason "Large transaction during late-night hours"
}
```
### Review Christmas transactions
This rule reviews transactions that occur on Christmas Day. It is a simple seasonal pattern you can adapt for holidays, maintenance windows, or business-specific blackout periods.
```bash ReviewChristmasTransactions.ws theme={"system"}
rule ReviewChristmasTransactions {
description "Flags transactions that occur on Christmas Day."
when month_of_year(created_at) == 12
and day_of_month(created_at) == 25
then review
score 0.6
reason "Transaction occurred on Christmas Day"
}
```
### Unusual transaction time
This rule reviews large transactions that happen in the early-morning window between 1 AM and 5 AM. It is a good template when you want to tune thresholds based on hours that are uncommon for a customer segment or product line.
```bash UnusualTransactionTime.ws theme={"system"}
rule UnusualTransactionTime {
description "Flags large transactions during unusual early-morning hours."
when hour_of_day(created_at) >= 1
and hour_of_day(created_at) < 5
and amount > 1000
then review
score 0.6
reason "Large transaction during unusual early-morning hours"
}
```
### Weekend transaction check
This rule reviews large transactions that occur on a weekend. It is a practical pattern for products where genuine activity is mostly weekday-driven and weekend spikes deserve a closer look.
```bash WeekendTransactionCheck.ws theme={"system"}
rule WeekendTransactionCheck {
description "Flags large transactions that occur on weekends."
when day_of_week(created_at) in (0, 6)
and amount > 5000
then review
score 0.4
reason "Large weekend transaction flagged for review"
}
```
***
See also [Setting conditions](/watch/rules/setting-conditions) and [Defining verdicts](/watch/rules/defining-verdicts).
***
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To ask questions or discuss issues, please [contact us](mailto:support@blnkfinance.com) or [join our Discord community](https://discord.gg/7WNv94zPpx).
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