timestamp format code example

Example 1: strtotime format

$date = '25/05/2010';
$date = str_replace('/', '-', $date);
echo date('Y-m-d', strtotime($date));

Example 2: excel date to unix timestamp

'VBA functions to convert between Excel and Unix date-times.

'These work on Windows and optionally the Mac:

Function UnixDateTime#(ExcelDateTime As Date, Optional Mac As Boolean)
    Dim OSOffset: OSOffset = IIf(Mac, 24107, 25569)
    UnixDateTime = (ExcelDateTime - OSOffset) * 86400
End Function
         
Function ExcelDateTime(UnixDateTime#, Optional Mac As Boolean) As Date
    Dim OSOffset: OSOffset = IIf(Mac, 24107, 25569)
    ExcelDateTime = (UnixDateTime / 86400) + OSOffset
End Function

Example 3: convert timestamp to datetime

from datetime import datetime

# current date and time
now = datetime.now()

timestamp = datetime.timestamp(now)
print("timestamp =", timestamp)