calenda.org

https://calenda.org· First analyzed 06 May 2026· Updated 06 May 2026

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calenda.org

Mobile

Sponsored

Hosting Provider

CNRS Centre de Calcul de l'IN2P3

IP Address

134.158.39.140

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Grenoble, France

ASN

AS789

Organization

CNRS Centre de Calcul de l'IN2P3

Nameservers

dns.univ-avignon.fr.ns4.cnrs.fr.ns6.gandi.net.ccoe129.in2p3.fr.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

812 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

378 KB

58 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CNRS Centre de Calcul de l'IN2P3

Technology Stack

4 Technologies Detected

Libraries

CSS Frameworks

Analytics

SEO Analysis

C67/100

Meta Tags9/15

Content12/12

Headings8/8

Technical13/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

calenda.orgcalenda.org

Calenda - The calendar for arts, humanities and social sciences

No description available for this page.

Title Length63 chars

Recommended: 50-60 chars (~375px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

7 rules

Sitemap reference found

Local SEO

Local Search Readiness

4/100

Poor

2 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

11/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:18%

Words:3,640

Token eff.:Poor Structure

Sections/1K:1.4

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary56w

Descriptive Headingsavg 2w

Canonical URL

Open Graph2/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

69/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

18/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

2/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

44/100

47 mg

CO₂e / view

378.1 KB

Page Weight

90%

Cleaner Than

New Visitor

53 mg

Returning (cached)

27 mg

Annual (10K/mo)

5.6 kg

Emission Segments

Data Center

10 mg

Network

11 mg

Device

25 mg

Resource Breakdown

JavaScript

207.6 KB

Images

85.8 KB

CSS

54.9 KB

HTML

27.3 KB

Other

2.5 KB

Green Hosting Not Verified

CNRS Centre de Calcul de l'IN2P3

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

89d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.05.2026

Valid Until

03.08.2026

Subject Alternative Names (2)

*.calenda.orgcalenda.org

SHA-256 Fingerprint

6C:BA:FB:57:55:49:11:CD:B2:45:32:28:41:E1:E5:DA:74:D9:3A:DA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Wed, 06 May 2026 19:41:50 GMT

set-cookie

techaro.lol-anubis-auth

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

pmg.labocleo.org

Domain Information

calenda.org

Domain Age

25y 9m

Created

17.07.2000

Expires

17.07.2027

Last Updated

14.09.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

59/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1, shrink-to-fit=no

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Roboto + verdana

WCAG Partial

44/100

Readability

/30

8/30

11px · LH 1.36

Hierarchy

/20

7/20

1.36x ratio

WCAG

/25

15/25

1.2:1 min contrast

Performance

/25

14/25

System fonts

Heading Font

Roboto

Sans15px

Body Font

verdana

Sans11px

Contrast Ratio

1.2:1

2 issues

Reading Comfort

~76 CPL

Wide lines

15px

22px

10px

11px

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.36). Increase to 1.4–1.6 for better readability.

⚠️ Wide lines: ~76 chars/line. Use max-width: 65ch for comfortable reading.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.2:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Flesch 0

Color Palette

6 unique colors

Light

#ffffff

Background· 80.7%

#b0c3ba

Primary· 4.7%

#b5d7e2

Secondary· 2.6%

#889fa0

Secondary· 2.6%

#d0d9db

Secondary· 2.4%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(12)static.openedition.org(2)analytics.openedition.org(1)

Website Identity

calenda.org

25 years old

Location detected: 🇫🇷 Francevia ip

Gandi SASen

Social Profiles

Facebook X (Twitter)

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Last analyzed: 06 May 2026 at 19:42

Historical Analysis & Change Tracking