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[time] Fix timezone_offset() and recalc_timestamp_local() always returning UTC (#14996)

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J. Nick Koston
2026-03-20 13:58:14 -10:00
committed by GitHub
parent 8fa2e75afa
commit a9a8f4cb3b
2 changed files with 8 additions and 10 deletions
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16
esphome/core/time.cpp
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@@ -283,19 +283,15 @@ void ESPTime::recalc_timestamp_local() {
bool dst_valid = time::is_in_dst(utc_if_dst, tz);
bool std_valid = !time::is_in_dst(utc_if_std, tz);
if (dst_valid && std_valid) {
// Ambiguous time (repeated hour during fall-back) - prefer standard time
this->timestamp = utc_if_std;
} else if (dst_valid) {
if (dst_valid && !std_valid) {
// Only DST interpretation is valid
this->timestamp = utc_if_dst;
} else if (std_valid) {
// Only standard interpretation is valid
this->timestamp = utc_if_std;
} else {
// Invalid time (skipped hour during spring-forward)
// libc normalizes forward: 02:30 CST -> 08:30 UTC -> 03:30 CDT
// Using std offset achieves this since the UTC result falls during DST
// All other cases use standard offset:
// - Both valid (ambiguous fall-back repeated hour): prefer standard time
// - Only standard valid: straightforward
// - Neither valid (spring-forward skipped hour): std offset normalizes
// forward to match libc mktime(), e.g. 02:30 CST -> 03:30 CDT
this->timestamp = utc_if_std;
}
#else

2
esphome/core/time.h
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@@ -1,5 +1,7 @@
#pragma once
#include "esphome/core/defines.h"
#include <cstdint>
#include <cstdlib>
#include <cstring>