diff --git a/cmd/mavend/system_reply_test.go b/cmd/mavend/system_reply_test.go
new file mode 100644
index 0000000..1e8732e
--- /dev/null
+++ b/cmd/mavend/system_reply_test.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/kami/maven/internal/router"
+)
+
+// systemHandler — a handler with nothing but a fixed clock, which is all
+// replySystem needs.
+func systemHandler(now time.Time) *reactiveHandler {
+	return &reactiveHandler{now: func() time.Time { return now }}
+}
+
+// TestReplySystemDateOffset — "какое число завтра" must answer tomorrow's
+// date, not today's (Vikunja #388).
+func TestReplySystemDateOffset(t *testing.T) {
+	// Thursday, 30 July 2026.
+	now := time.Date(2026, 7, 30, 14, 5, 0, 0, time.UTC)
+	h := systemHandler(now)
+	cases := []struct{ utterance, want string }{
+		{"какое сегодня число", "сегодня четверг, 30 июля 2026 года"},
+		{"какое число", "сегодня четверг, 30 июля 2026 года"},
+		{"какое число завтра", "завтра пятница, 31 июля 2026 года"},
+		{"какое число послезавтра", "послезавтра суббота, 1 августа 2026 года"},
+		{"какое было число вчера", "вчера среда, 29 июля 2026 года"},
+	}
+	for _, c := range cases {
+		got := h.replySystem(context.Background(), router.Decision{Utterance: c.utterance})
+		if got != c.want {
+			t.Errorf("replySystem(%q) = %q, want %q", c.utterance, got, c.want)
+		}
+	}
+}
+
+// TestReplySystemClockCity — the clock arm must not answer local time for a
+// question about another city (Vikunja #388). Known cities get their own zone;
+// unknown places get an honest "local time only".
+func TestReplySystemClockCity(t *testing.T) {
+	// 12:00 UTC — Kyiv is +03 in July, Moscow +03, London +01.
+	now := time.Date(2026, 7, 30, 12, 0, 0, 0, time.UTC)
+	h := systemHandler(now)
+	cases := []struct{ utterance, want string }{
+		{"который час", "сейчас 12 часов ровно"},
+		{"который час в киеве", "в Киеве сейчас 15 часов ровно"},
+		{"сколько времени в москве", "в Москве сейчас 15 часов ровно"},
+		{"который час в лондоне", "в Лондоне сейчас 13 часов ровно"},
+		{"который час в бишкеке", onlyLocalTimeReply},
+	}
+	for _, c := range cases {
+		got := h.replySystem(context.Background(), router.Decision{Utterance: c.utterance})
+		if got != c.want {
+			t.Errorf("replySystem(%q) = %q, want %q", c.utterance, got, c.want)
+		}
+	}
+}
diff --git a/cmd/mavend/voice.go b/cmd/mavend/voice.go
index f1e0355..249fba6 100644
--- a/cmd/mavend/voice.go
+++ b/cmd/mavend/voice.go
@@ -55,6 +55,9 @@ import (
 	"strings"
 	"sync"
 	"time"
+	// Embeds the tz database in the binary so time.LoadLocation works even in
+	// a container image without /usr/share/zoneinfo. Stdlib, offline.
+	_ "time/tzdata"
 
 	hexisclient "github.com/kami/hexis/pkg/client"
 	"github.com/kami/maven/internal/audio"
@@ -936,6 +939,115 @@ var ruMonths = []string{
 	"июля", "августа", "сентября", "октября", "ноября", "декабря",
 }
 
+// onlyLocalTimeReply — the honest answer when the user names a place whose
+// time zone we cannot resolve offline. Better than confidently naming the
+// wrong city's time.
+const onlyLocalTimeReply = "я знаю только местное время, про другие города пока не скажу."
+
+// cityZone — a city we can answer the clock for: its IANA time zone (resolved
+// from the tzdata built into the binary, never over the network) and its
+// Russian name in the "в ..." case.
+type cityZone struct {
+	zone          string
+	prepositional string
+}
+
+// cityZones maps a lowercase city stem to its zone. Stems, not full words, so
+// "в москве" / "москва" both hit. Keep in sync-ish with the weather city list.
+var cityZones = map[string]cityZone{
+	"москв":        {"Europe/Moscow", "Москве"},
+	"moscow":       {"Europe/Moscow", "Москве"},
+	"питер":        {"Europe/Moscow", "Питере"},
+	"петербур":     {"Europe/Moscow", "Петербурге"},
+	"киев":         {"Europe/Kyiv", "Киеве"},
+	"kyiv":         {"Europe/Kyiv", "Киеве"},
+	"kiev":         {"Europe/Kyiv", "Киеве"},
+	"минск":        {"Europe/Minsk", "Минске"},
+	"лондон":       {"Europe/London", "Лондоне"},
+	"london":       {"Europe/London", "Лондоне"},
+	"париж":        {"Europe/Paris", "Париже"},
+	"paris":        {"Europe/Paris", "Париже"},
+	"берлин":       {"Europe/Berlin", "Берлине"},
+	"berlin":       {"Europe/Berlin", "Берлине"},
+	"нью-йорк":     {"America/New_York", "Нью-Йорке"},
+	"new york":     {"America/New_York", "Нью-Йорке"},
+	"токио":        {"Asia/Tokyo", "Токио"},
+	"tokyo":        {"Asia/Tokyo", "Токио"},
+	"тбилиси":      {"Asia/Tbilisi", "Тбилиси"},
+	"екатеринбург": {"Asia/Yekaterinburg", "Екатеринбурге"},
+	"новосибирск":  {"Asia/Novosibirsk", "Новосибирске"},
+	"владивосток":  {"Asia/Vladivostok", "Владивостоке"},
+}
+
+// lookupCityZone finds a known city named in the utterance.
+func lookupCityZone(u string) (cityZone, bool) {
+	for stem, cz := range cityZones {
+		if strings.Contains(u, stem) {
+			return cz, true
+		}
+	}
+	return cityZone{}, false
+}
+
+// notPlaceAfterV — words that follow "в" without naming a place, so
+// mentionsUnknownPlace does not mistake them for a city.
+var notPlaceAfterV = map[string]bool{
+	"данный": true, "данную": true, "этот": true, "эту": true,
+	"котором": true, "какое": true, "какой": true, "который": true,
+	"общем": true, "точности": true, "курсе": true, "сутках": true,
+	"часах": true, "минутах": true, "секундах": true, "неделе": true,
+}
+
+// mentionsUnknownPlace reports whether the question has a "в <слово>" phrase
+// that looks like a place we do not know ("который час в киеве"). Used only to
+// pick the honest "local time only" reply instead of answering local time as
+// if it were the city's.
+func mentionsUnknownPlace(u string) bool {
+	toks := strings.Fields(u)
+	for i := 0; i+1 < len(toks); i++ {
+		if toks[i] != "в" && toks[i] != "во" {
+			continue
+		}
+		next := strings.Trim(toks[i+1], ".,?!")
+		if next == "" || notPlaceAfterV[next] {
+			continue
+		}
+		// A number after "в" is a clock ("в 5 часов"), not a place.
+		if _, err := strconv.Atoi(strings.SplitN(next, ":", 2)[0]); err == nil {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+// ruClock renders the clock part of the time reply: "15 часов 4 минуты".
+func ruClock(t time.Time) string {
+	h, m := t.Hour(), t.Minute()
+	hourWord := ruPlural(h, "час", "часа", "часов")
+	if m == 0 {
+		return fmt.Sprintf("%d %s ровно", h, hourWord)
+	}
+	return fmt.Sprintf("%d %s %d %s", h, hourWord, m, ruPlural(m, "минута", "минуты", "минут"))
+}
+
+// dayPrefix names the day relative to now ("завтра", "вчера", …) so the date
+// reply opens the way a person would say it.
+func dayPrefix(now, day time.Time) string {
+	base := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+	switch int(day.Sub(base).Hours() / 24) {
+	case -1:
+		return "вчера"
+	case 0:
+		return "сегодня"
+	case 1:
+		return "завтра"
+	case 2:
+		return "послезавтра"
+	}
+	return "это"
+}
+
 func ruPlural(n int, one, two, many string) string {
 	n = n % 100
 	if n > 10 && n < 20 {
@@ -1014,18 +1126,32 @@ func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision)
 
 	switch {
 	case strings.Contains(u, "час") || strings.Contains(u, "врем"):
-		h := now.Hour()
-		m := now.Minute()
-		hourWord := ruPlural(h, "час", "часа", "часов")
-		if m == 0 {
-			return fmt.Sprintf("сейчас %d %s ровно", h, hourWord)
+		// "который час в киеве" — answer for the named city when we know its
+		// time zone locally, never guess. Unknown place: say so plainly.
+		if city, ok := lookupCityZone(u); ok {
+			loc, err := time.LoadLocation(city.zone)
+			if err != nil {
+				log.Printf("voice: load zone %s: %v", city.zone, err)
+				return onlyLocalTimeReply
+			}
+			return fmt.Sprintf("в %s сейчас %s", city.prepositional, ruClock(now.In(loc)))
 		}
-		minWord := ruPlural(m, "минута", "минуты", "минут")
-		return fmt.Sprintf("сейчас %d %s %d %s", h, hourWord, m, minWord)
+		if mentionsUnknownPlace(u) {
+			return onlyLocalTimeReply
+		}
+		return "сейчас " + ruClock(now)
 	case strings.Contains(u, "день") || strings.Contains(u, "числ"):
-		dow := ruWeekdays[now.Weekday()]
-		month := ruMonths[now.Month()-1]
-		return fmt.Sprintf("сегодня %s, %d %s %d года", dow, now.Day(), month, now.Year())
+		// "какое число завтра" — answer for the day the user asked about,
+		// not today. Reuses the router's calendar day-word parser.
+		day := now
+		prefix := "сегодня"
+		if d, ok := router.ParseCalendarDate(u, now); ok {
+			day = d
+			prefix = dayPrefix(now, d)
+		}
+		dow := ruWeekdays[day.Weekday()]
+		month := ruMonths[day.Month()-1]
+		return fmt.Sprintf("%s %s, %d %s %d года", prefix, dow, day.Day(), month, day.Year())
 	case strings.Contains(u, "кто дома") || strings.Contains(u, "человек дома"):
 		return "присутствие пока не подключено к голосовому запросу."
 	case strings.Contains(u, "памят") || strings.Contains(u, "процессор") || strings.Contains(u, "загрузк") || strings.Contains(u, "статус") || strings.Contains(u, "работа") || strings.Contains(u, "сервис") || strings.Contains(u, "диск") || strings.Contains(u, "ip") || strings.Contains(u, "аптайм") || strings.Contains(u, "трафик") || strings.Contains(u, "интернет"):
diff --git a/internal/router/slots.go b/internal/router/slots.go
index ea579f5..95998a2 100644
--- a/internal/router/slots.go
+++ b/internal/router/slots.go
@@ -449,16 +449,30 @@ func (AnaphoraResolver) Resolve(text string) (ref string, ok bool) {
 	return "", false
 }
 
-// ParseCalendarDate detects RU calendar date words in text and returns the
-// resolved time (midnight UTC+0 for "сегодня"/"today", next day for "завтра"/"tomorrow").
-// Returns zero time + false if no match.
+// ParseCalendarDate detects RU/EN calendar day words in text and returns
+// midnight of that day in now's own time zone. Handles "сегодня", "завтра",
+// "послезавтра", "вчера" (and the English words). Returns zero time + false
+// if no match.
+//
+// "послезавтра" is checked before "завтра" because it contains it.
 func ParseCalendarDate(text string, now time.Time) (time.Time, bool) {
 	lower := strings.ToLower(text)
-	if strings.Contains(lower, "сегодня") || strings.Contains(lower, "today") {
-		return now.Truncate(24 * time.Hour), true
-	}
-	if strings.Contains(lower, "завтра") || strings.Contains(lower, "tomorrow") {
-		return now.Truncate(24 * time.Hour).Add(24 * time.Hour), true
+	switch {
+	case strings.Contains(lower, "сегодня") || strings.Contains(lower, "today"):
+		return midnight(now, 0), true
+	case strings.Contains(lower, "послезавтра") || strings.Contains(lower, "day after tomorrow"):
+		return midnight(now, 2), true
+	case strings.Contains(lower, "завтра") || strings.Contains(lower, "tomorrow"):
+		return midnight(now, 1), true
+	case strings.Contains(lower, "вчера") || strings.Contains(lower, "yesterday"):
+		return midnight(now, -1), true
 	}
 	return time.Time{}, false
 }
+
+// midnight returns the start of the day that is `days` away from now, in
+// now's time zone (now.Truncate(24h) would cut on a UTC boundary instead).
+func midnight(now time.Time, days int) time.Time {
+	y, m, d := now.AddDate(0, 0, days).Date()
+	return time.Date(y, m, d, 0, 0, 0, 0, now.Location())
+}
diff --git a/internal/router/slots_ru_test.go b/internal/router/slots_ru_test.go
index 4c52d37..f3e9f85 100644
--- a/internal/router/slots_ru_test.go
+++ b/internal/router/slots_ru_test.go
@@ -45,6 +45,9 @@ func TestParseCalendarDate(t *testing.T) {
 		{"расписание на завтра", time.Date(2026, 7, 7, 0, 0, 0, 0, time.UTC), true},
 		{"what's today", time.Date(2026, 7, 6, 0, 0, 0, 0, time.UTC), true},
 		{"tomorrow plans", time.Date(2026, 7, 7, 0, 0, 0, 0, time.UTC), true},
+		{"какое число послезавтра", time.Date(2026, 7, 8, 0, 0, 0, 0, time.UTC), true},
+		{"что было вчера", time.Date(2026, 7, 5, 0, 0, 0, 0, time.UTC), true},
+		{"yesterday plans", time.Date(2026, 7, 5, 0, 0, 0, 0, time.UTC), true},
 		{"какая погода", time.Time{}, false},
 		{"сколько времени", time.Time{}, false},
 		{"", time.Time{}, false},