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clarify comment about days_to_year_start

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J. Nick Koston
2026-01-30 01:51:20 -06:00
parent cde2199b64
commit b5e073bf7f
1 changed files with 3 additions and 3 deletions
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6
esphome/components/time/posix_tz.cpp
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@@ -277,9 +277,9 @@ static int __attribute__((noinline)) days_from_year_start(int year, int month, i
return days;
}
// Calculate days from epoch to Jan 1 of given year
// Note: Only valid for years >= 1970. Pre-1970 timestamps are not supported
// as they are extremely rare for IoT devices.
// Calculate days from epoch to Jan 1 of given year (for DST transition calculations)
// Only supports years >= 1970. Timezone is either compiled in from YAML or set by
// Home Assistant, so pre-1970 dates are not a concern.
static int64_t __attribute__((noinline)) days_to_year_start(int year) {
int64_t days = 0;
for (int y = 1970; y < year; y++) {