What are the potential issues with storing birthdays as Unix timestamps in a PHP application?

Storing birthdays as Unix timestamps in a PHP application can lead to potential issues with leap years, time zones, and daylight saving time adjustments. To solve this problem, it's better to store birthdays as date strings in a standardized format like "YYYY-MM-DD" to avoid any inconsistencies in date calculations. 

// Storing birthdays as date strings in a standardized format
$birthday = "1990-05-15";

Keywords

Unix timestamps birthdays PHP application date functions timezone conversion

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