---
title: Count Résumé Months Without Double-Counting Overlapping Roles — Free
description: Adding the lengths of every role can count the same month twice. Enter inclusive first and last month labels to see each span, its shared months and the union of calendar months represented in your work history.
category: career
last_verified: 2026-09-30
freshness: green
published: 2026-09-30
canonical_url: https://gratis-ai.pages.dev/articles/resume-date-month-union.html
companion_app_url: https://gratis-ai.pages.dev/apps/resume-date-month-union.html
reading_time_minutes: 9
tags: career, monthunion, local-first, explicit-assumptions, no-account
---

# Count Résumé Months Without Double-Counting Overlapping Roles — Free

Adding the lengths of every role can count the same month twice. Enter inclusive first and last month labels to see each span, its shared months and the union of calendar months represented in your work history.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $4 one-time. Nothing in the free tier is gated.

## Who it's for

People reconciling month-level résumé dates against their own records

## What's free

- one complete unwatermarked tenure-span strip run in the app
- three labeled samples and unlimited article-demo calculations
- complete result text and a user-triggered input-state link

## Optional paid add-on

**$4 one-time.**

- unlimited subsequent tenure-span strip app calculations after a local convenience signal
- print the tenure-span strip with visible assumptions and its safety boundary
- CSV of the displayed distinct calendar months and row workings; conditional estimate uses your manual-retyping minutes
- five local reading summaries (headline/count/time), not saved full inputs or cross-device backups

## Sources & verification

- Tool: GratisAI local-first instrument (no key, no account)
- Primary source: the free tool itself (local-first, no external dependency)
- Last verification: 2026-09-30 (green)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/resume-date-month-union.html
- Companion app: https://gratis-ai.pages.dev/apps/resume-date-month-union.html
- This machine-readable mirror: /mirrors/resume-date-month-union.md

*Generated free at https://gratis-ai.pages.dev/articles/resume-date-month-union.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*