Turn a HubSpot Dropdown into a Real Date Property
Let people pick a readable date from a dropdown, store the Unix timestamp behind it, then write it into a real date property with a custom-coded workflow. No more wondering whether 03/04/2026 means March or April.
Example scenario: course signup (what this enables)
Flow:
- User selects a date in Course Start Date (Friendly)
- Workflow runs and sets Course Start Date (Date)
- You can now:
- Send reminders 7 days before
- Trigger a sequence of emails 1 day after
- Build lists like "Course starts in next 30 days", which is the point at which using this clean date property in a rolling filter becomes possible
- Report on upcoming cohorts cleanly
Pros and Considerations
Pros
- Great UX: users pick a readable date from a controlled list.
- Reliable automation: you can use native date-based workflow delays and triggers.
- Better reporting: date-based filters and dashboards behave properly.
- No ambiguous date formats: everyone sees the same thing. That matters more here than it does in the US, because Australia writes dates day first, so 03/04/2026 is 3 April. The Australian Government Style Manual sets that convention, and software built for the American market often assumes the month comes first. A dropdown option that reads "3 April 2026" removes the guess entirely.
Considerations (so it does not bite you later)
- Timestamps must be accurate: decide your standard (commonly midnight UTC) and stick to it.
- Requires a custom-coded workflow action: not a pure no-code setup.
- Ongoing maintenance: every new dropdown option must include the correct timestamp internal value.
- Timezones: a timestamp represents a moment in time. If your business operates across regions, define whether dates should be treated as UTC or local business time, then test how HubSpot displays it.
Is 03/04/2026 March or April on your forms?
Half your database was typed by people who read it the other way.
Wrapping Up
If you want users to pick dates without errors, but still need HubSpot to behave like those dates are real (because workflows and reporting are not mind readers), this hack is a tidy fix.
Once the date property is genuinely a date, the rest of the portal can use it. It is what makes another workflow that depends on a real date property work, and the same technique covers building a day-of-week property the same way.
Want help building more smart automations in HubSpot? Contact us. Cleaning up date data across a portal is also how we clean up date data as part of a RevOps build.
Who adds next year's dates to the dropdown?
Every option in that dropdown is a timestamp somebody typed once.