diff --git a/source/plugins/core/index.mjs b/source/plugins/core/index.mjs
index a198f2ba..bc825030 100644
--- a/source/plugins/core/index.mjs
+++ b/source/plugins/core/index.mjs
@@ -93,7 +93,9 @@ export default async function({login, q}, {conf, data, rest, graphql, plugins, q
   const created = new Date(data.user.createdAt)
   const diff = now - created
   const years = new Date(diff).getUTCFullYear() - new Date(0).getUTCFullYear()
-  const months = new Date(now).getUTCMonth() - created.getUTCMonth() + 12 * years
+  const nowMonth = new Date(now).getUTCMonth()
+  const createdMonth = created.getUTCMonth()
+  const months = nowMonth - createdMonth + 12 * (years + (nowMonth < createdMonth ? 1 : 0))
   const days = Math.floor((now - beginningOfYear) / (1000 * 60 * 60 * 24))
   computed.registered = {years: years + days / 365.25, months}
   computed.registration = years ? `${years} year${imports.s(years)} ago` : months ? `${months} month${imports.s(months)} ago` : `${days} day${imports.s(days)} ago`