B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
17%
17% -- marketers finding day most effective share for Thursday email sends (2025)
17% of marketers find Thursday to be the most effective day for sending newsletters/marketing emails.
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
17%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
HubSpot
Primary
Tier C
https://planleft.com/blog/when-is-the-best-time-to-send-newsletters/?utm_campaign=best-time-newslett… ↗
Source Article
When is the Best Time to Send Newsletters? - Plan Left
Timing is everything, especially when it comes to email marketing. Sending your newsletters at the right moment will boost engagement and drive better results for your business.
The Golden Hours for Newsletter Delivery
Research by HubSpot, involving over 150 marketing and advertising professionals, …
Original Research
HubSpot
· Original study ↗
Methodology
Cited from HubSpot research on best day to send emails
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Thursday email sends: 17% marketers finding day most effective share. Source: HubSpot (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/thursday-most-effective-17
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<blockquote cite="https://lighthousedata.io/data/thursday-most-effective-17" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>17%</strong> -- marketers finding day most effective share for Thursday email sends<br><small>Source: HubSpot (2025) · <a href="https://lighthousedata.io/data/thursday-most-effective-17" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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