Best Time To Send Email.

Send a cold email at the start of the prospect's working day, in their time zone. In a published study of 7.5 million cold emails sent in 2025, the 8 am to 12 pm block had the highest reply rate, 0.54%, with 5 to 8 am close behind at 0.52%. Afternoons were lower at 0.47% and nights lowest at 0.40%. This tool marks one hour before the workday through two hours into it as Best.

Tuesday to Thursday, but only by a small margin. In the same study, Wednesday and Thursday replied at 0.48%, Monday and Tuesday at 0.45%, Friday at 0.44% and Saturday at 0.35%, so don't hold a campaign for a week to hit a Wednesday. Working weeks also differ by country: Saudi Arabia, Qatar, Egypt and Israel rest on Friday and Saturday. Skip local public holidays too, which this tool does not know.

For work email, the worst times are outside the recipient's working hours, especially overnight, and on their weekend. Mail sent overnight sits under the morning's arrivals by the time they look. Weekends are quiet for business mail because far fewer people work: in the US, 87% of full-time workers work on an average weekday against 29% on a weekend day. This tool marks those hours Avoid.

Always use the recipient's time zone, because their working day decides whether your email is seen. A 9 am send from New York usually reaches London at 2 pm and Sydney around midnight. This tool shows each window in the recipient's local time and converts it to yours, including the weeks when the gap between two cities changes because of daylight saving.

Send in each contact's own local time if your sending tool supports it, and use the overlap of everyone's working hours if it doesn't. In SendCanyon a campaign window applies in each contact's time zone when the contact has one, so one 08:00 to 10:00 window reaches Berlin and Denver at their own 8 am. If you must pick one time zone, this tool finds the shared hours, and if there are none it says to split the list.

Send a follow-up in the same morning window, at least two working days after the first email and on a different weekday. A different day meets the person at a different point in their week, and the morning keeps you in their first look at the inbox. With Follow-up selected, this tool spaces the suggested send dates two working days apart and never repeats a weekday back to back.

Not for the recipient, because their 8 am is still 8 am. It changes how that time maps to your clock. In 2026 the US changes clocks on 8 March and 1 November, and the UK and EU on 29 March and 25 October, so for those few weeks New York is four hours behind London instead of five. This tool works from the real dates and shows each changed window with its date range.

Only a little, and indirectly. Mailbox providers decide spam placement mainly from authentication and sender reputation. Mail that arrives while people are working is more likely to be read and answered, which helps reputation over time. A good send time can't make up for a missing SPF, DKIM or DMARC record or an unwarmed domain, so check those first and then tune the timing.

It is free, and it works from fixed, published rules rather than a prediction. Each 15-minute slot of the recipient's week is graded Best, Good, Fair or Avoid from their working hours, working days and the email type. Time zones come from the IANA database and working weeks from the Unicode CLDR. AI only turns a description of your audience into inputs or explains the result; it never picks the times.