timezone from php.ini

UTC

set the timezone in a program

America/Los_Angeles

using the date function from the computer

2026/03/14

assigning the timestamp to a variable

1773471770

you can create a timestamp for January 15, 2006 as by using the strtotime function

1137312000

today plus 1 day using the strtotime function

1773558000

subtracting $importantDate from today using the strtotime function

-86400 $today - $importantDate 1773471600 - 1773558000

86400 $importantDate - $today 1773558000 - 1773471600

-24 to find the amount of hours since the important date, look at the php program.