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Business Days Calculator

Free business days calculator for 160+ countries. Add, subtract, or count working days with public holidays.

Added July 14, 2026 · Last analysed July 14, 2026 · via · 43% unique tagline

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Screenshot of Business Days Calculator

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 14 July 2026; the live site may have changed since.

Business Days Calculator covers some of the launch checklist, with a thorough launch checklist, fast page loads, and clean crawl signals. Worth fixing first: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on July 14, 2026. The site is hosted on Vercel, with a domain registered 2 days before launch. Our crawler found 12 technologies on this site, covering analytics, CSS frameworks, DNS providers, and web fonts. The stack includes Next.js, React, and Tailwind CSS.

It's also running the same core stack as 10,280 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

5.5
StackScope Score
Fair
100/100 Launch Readiness
Launch ready
1/6 Security Headers
Poor
0/3 Legal
Missing
2/2 Crawl files
Complete
92/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (12)

Infrastructure
DNS one.com
Hosting Vercel
Security HSTS
Build & Framework
CSS framework Tailwind CSS
Font Google Fonts
Framework React
Meta-framework Next.js (5)
Analytics & Marketing
Analytics Ahrefs
Google Analytics (4)
SEO Google Search Console
Tag management Google Tag Manager medium
Commerce & Payments
Monetisation Ko-fi (3)

Infrastructure

Network
AMAZON-02 - Amazon.com, Inc., US
AS16509 · US
DNS
one.com
Authoritative nameserver
DNSSEC
Enabled
DNSKEY records published. DNS responses signed.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 11 Jul 2026 to 9 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3 days
Registered Jul 2026 · One.com A/S

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (9)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_SFZG6CDC7S 1y Google Analytics
Local storage (7)
KeySizeDetected as
cbd:holidays:v1:US:2023 2 KB -
cbd:holidays:v1:US:2024 2 KB -
cbd:holidays:v1:US:2025 2 KB -
cbd:holidays:v1:US:2026 2 KB -
cbd:holidays:v1:US:2027 2 KB -
cbd:holidays:v1:US:2028 2 KB -
cbd:holidays:v1:US:2029 2 KB -

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 81 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
⚠
Meta description is 162 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

111 ms Server response
92% Faster than peers
248 ms Largest contentful paint
0.00 Cumulative layout shift
1.0 MB Page weight
305 KB Image weight
5 Third-party domains
0 Console errors
0 Failed requests

⚠ 2 images: 2 oversized, 2 without width/height, 1 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (243 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
Detection works best on English language sites.

Security Headers (1/6)

✗
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✗
Content-Security-Policy
✓
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting
17 JS files
3 CSS files
5 Third-party domains

Brand Colours

App Manifest

Business Days Calculator
display: standalone 2 icons
theme #0d5c3c
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.