Source
$date1 = date('D d/m/Y h:i:s A',strtotime('2015-06-01'));
Here's a list of format that you can use (Source)
Day of Month
____________
d | Numeric, with leading zeros 01–31
j | Numeric, without leading zeros 1–31
S | The English suffix for the day of the month st, nd or th in the 1st, 2nd or 15th.
Weekday
_______
l | Full name (lowercase 'L') Sunday – Saturday
D | Three letter name Mon – Sun
Month
______
m | Numeric, with leading zeros 01–12
n | Numeric, without leading zeros 1–12
F | Textual full January – December
M | Textual three letters Jan - Dec
Year
____
Y | Numeric, 4 digits Eg., 1999, 2003
y | Numeric, 2 digits Eg., 99, 03
Time
____
a | Lowercase am, pm
A | Uppercase AM, PM
g | Hour, 12-hour, without leading zeros 1–12
h | Hour, 12-hour, with leading zeros 01–12
G | Hour, 24-hour, without leading zeros 0-23
H | Hour, 24-hour, with leading zeros 00-23
i | Minutes, with leading zeros 00-59
s | Seconds, with leading zeros 00-59
T | Timezone abbreviation Eg., EST, MDT ...
Full Date/Time
c | ISO 8601 2004-02-12T15:19:21+00:00
r | RFC 2822 Thu, 21 Dec 2000 16:01:07 +0200