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Do you want to change the Date Format for your site? It is possible, just follow the instructions.

You need to switch some attributes.
1)To show a date in the Format: Day.Month.YYYY, input into the Short or Long Date Format %d.%m.%Y.
2)To show a date and time - Month/Day/Year Hours:Minutes:Seconds input into the Long Date Format %m/%d/%Y %H:%i:%s.
3)To use PM or AM format for time input - %I%p:%i:%s. You will see time in this format 09am:43:12.
4) you can use different types of separators:

Separator | Format | Result
. | Day.Month.YYYY | %d.%m.%Y
/ | Month/Day/Year | %m/%d/%Y
* | Month*Day*Year | %m*%d*%Y
some other separators: - : ; --

Use the list to form the date format on your liking.
Specifier
Description
%m
Month, numeric (01..12)
%w
Day of the week (0=Sunday..6=Saturday)
%d
Day of the month, numeric (00..31)
%Y
Year, numeric, 4 digits
%y
Year, numeric, 2 digits
%b
Abbreviated month name (Jan..Dec)
%H
Hour (00..23)
%I
Hour (01..12)
%p
AM or PM
%i
Minutes, numeric (00..59)
%s
Seconds (00..59)