{
 "name": "Cold email reply timing: when prospects reply, by weekday and hour (ReplyLead campaign book, 2026)",
 "publisher": "ReplyLead",
 "license": "CC BY 4.0",
 "url": "https://replylead.com/best-time-to-send-cold-email.html",
 "unit": "one campaign reply ('Tracked Reply' with a campaign), received 2026-04-01..2026-09-24 UTC",
 "timezone": "US Eastern (EDT, UTC-4)",
 "campaigns": 115,
 "human_replies": 4375,
 "interested_replies": 554,
 "automated_replies": 5979,
 "by_weekday": [
  {
   "day": "Monday",
   "human_replies": 823,
   "share": 0.1881142857142857,
   "share_ci": [
    0.17680930495565375,
    0.19996650716780834
   ],
   "interested_replies": 109,
   "interested_share": 0.1967509025270758
  },
  {
   "day": "Tuesday",
   "human_replies": 760,
   "share": 0.1737142857142857,
   "share_ci": [
    0.16277517110090262,
    0.18522590754053536
   ],
   "interested_replies": 95,
   "interested_share": 0.17148014440433212
  },
  {
   "day": "Wednesday",
   "human_replies": 713,
   "share": 0.16297142857142857,
   "share_ci": [
    0.15232348950513394,
    0.17421072447511146
   ],
   "interested_replies": 92,
   "interested_share": 0.16606498194945848
  },
  {
   "day": "Thursday",
   "human_replies": 756,
   "share": 0.1728,
   "share_ci": [
    0.16188503880135993,
    0.1842890726348702
   ],
   "interested_replies": 82,
   "interested_share": 0.148014440433213
  },
  {
   "day": "Friday",
   "human_replies": 567,
   "share": 0.1296,
   "share_ci": [
    0.11997158954773372,
    0.13987832144242407
   ],
   "interested_replies": 65,
   "interested_share": 0.11732851985559567
  },
  {
   "day": "Saturday",
   "human_replies": 346,
   "share": 0.07908571428571429,
   "share_ci": [
    0.0714529963772913,
    0.08745697652513114
   ],
   "interested_replies": 50,
   "interested_share": 0.09025270758122744
  },
  {
   "day": "Sunday",
   "human_replies": 410,
   "share": 0.09371428571428571,
   "share_ci": [
    0.08543135837198626,
    0.10271008981376224
   ],
   "interested_replies": 61,
   "interested_share": 0.11010830324909747
  }
 ],
 "by_hour_et": [
  {
   "hour_et": 0,
   "human_replies": 27,
   "share": 0.006171428571428572,
   "interested_replies": 4,
   "interested_share": 0.007220216606498195
  },
  {
   "hour_et": 1,
   "human_replies": 22,
   "share": 0.005028571428571428,
   "interested_replies": 7,
   "interested_share": 0.01263537906137184
  },
  {
   "hour_et": 2,
   "human_replies": 34,
   "share": 0.0077714285714285715,
   "interested_replies": 8,
   "interested_share": 0.01444043321299639
  },
  {
   "hour_et": 3,
   "human_replies": 23,
   "share": 0.005257142857142857,
   "interested_replies": 7,
   "interested_share": 0.01263537906137184
  },
  {
   "hour_et": 4,
   "human_replies": 26,
   "share": 0.005942857142857143,
   "interested_replies": 7,
   "interested_share": 0.01263537906137184
  },
  {
   "hour_et": 5,
   "human_replies": 25,
   "share": 0.005714285714285714,
   "interested_replies": 7,
   "interested_share": 0.01263537906137184
  },
  {
   "hour_et": 6,
   "human_replies": 39,
   "share": 0.008914285714285715,
   "interested_replies": 12,
   "interested_share": 0.021660649819494584
  },
  {
   "hour_et": 7,
   "human_replies": 52,
   "share": 0.011885714285714286,
   "interested_replies": 10,
   "interested_share": 0.018050541516245487
  },
  {
   "hour_et": 8,
   "human_replies": 103,
   "share": 0.023542857142857143,
   "interested_replies": 15,
   "interested_share": 0.02707581227436823
  },
  {
   "hour_et": 9,
   "human_replies": 251,
   "share": 0.05737142857142857,
   "interested_replies": 21,
   "interested_share": 0.03790613718411552
  },
  {
   "hour_et": 10,
   "human_replies": 362,
   "share": 0.08274285714285715,
   "interested_replies": 24,
   "interested_share": 0.04332129963898917
  },
  {
   "hour_et": 11,
   "human_replies": 380,
   "share": 0.08685714285714285,
   "interested_replies": 43,
   "interested_share": 0.0776173285198556
  },
  {
   "hour_et": 12,
   "human_replies": 384,
   "share": 0.08777142857142857,
   "interested_replies": 47,
   "interested_share": 0.08483754512635379
  },
  {
   "hour_et": 13,
   "human_replies": 403,
   "share": 0.09211428571428572,
   "interested_replies": 59,
   "interested_share": 0.10649819494584838
  },
  {
   "hour_et": 14,
   "human_replies": 426,
   "share": 0.09737142857142857,
   "interested_replies": 56,
   "interested_share": 0.10108303249097472
  },
  {
   "hour_et": 15,
   "human_replies": 382,
   "share": 0.08731428571428572,
   "interested_replies": 40,
   "interested_share": 0.07220216606498195
  },
  {
   "hour_et": 16,
   "human_replies": 381,
   "share": 0.08708571428571428,
   "interested_replies": 46,
   "interested_share": 0.08303249097472924
  },
  {
   "hour_et": 17,
   "human_replies": 349,
   "share": 0.07977142857142858,
   "interested_replies": 40,
   "interested_share": 0.07220216606498195
  },
  {
   "hour_et": 18,
   "human_replies": 279,
   "share": 0.06377142857142858,
   "interested_replies": 45,
   "interested_share": 0.0812274368231047
  },
  {
   "hour_et": 19,
   "human_replies": 153,
   "share": 0.03497142857142857,
   "interested_replies": 19,
   "interested_share": 0.03429602888086643
  },
  {
   "hour_et": 20,
   "human_replies": 112,
   "share": 0.0256,
   "interested_replies": 11,
   "interested_share": 0.019855595667870037
  },
  {
   "hour_et": 21,
   "human_replies": 58,
   "share": 0.013257142857142858,
   "interested_replies": 5,
   "interested_share": 0.009025270758122744
  },
  {
   "hour_et": 22,
   "human_replies": 55,
   "share": 0.012571428571428572,
   "interested_replies": 11,
   "interested_share": 0.019855595667870037
  },
  {
   "hour_et": 23,
   "human_replies": 49,
   "share": 0.0112,
   "interested_replies": 10,
   "interested_share": 0.018050541516245487
  }
 ],
 "limits": "Observational. Reply arrival partly mirrors when the campaigns were scheduled to send; it is not a controlled test of send time. Recipient time zones and locations are not known per reply; US Eastern is used as a single reference clock. Automatic replies, which fire on delivery, show the campaigns sent between 06:00 and 19:59 Eastern on every day of the week."
}