Answer
PHP uses date_default_timezone_set() or php.ini. Correct timezone handling prevents scheduling bugs and inconsistent timestamps.
Quick Answer
PHP uses the system timezone by default (UTC recommended). Set date.timezone in php.ini or call date_default_timezone_set() at app start. DateTime and DateTimeImmutable classes handle timezone conversions. Store all dates in UTC in the database, convert to user timezone only for display. Wrong timezone handling causes bugs with DST transitions, scheduling, and log timestamps.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ