Carbon

Initial

Carbon::createFromFormat('Y-m-d H:i:s', session()->get('auth_google_login'));

Carbon::now();

https://carbon.nesbot.com/docs/

Unit test

$now = \Carbon\Carbon::create(2020,01, 12, 01, 01, 01);
\Carbon\Carbon::setTestNow($now);

Date/Time Format

Day Character Example
d 01-31
D Mon to Sun
j 1-31
l (lowercase L) Sunday to Saturday
N 1-7 (Mon to Sun)
S st, nd, rd or th.
w 0-6 (Sun to Sat)
z 0-365
Week Character Example
W 1-42 42 weeks
Month Character Example
F January to December
m 01 to 12
M Jan to Dec
n 1 to 12
t 28 to 31
Year Character Example
L 1 for leap, 0 otherwise
o 2018
Y same as o
y 98 or 99
Time Character Example
a am/pm
A AM/PM
B internet time 000 to 999
g 1-12 hour
G 0-23 hour
h 01 to 12
H 00 to 23
i 00 to 59 minutes
s 00 to 59 seconds
u Microseconds 6 digital
v Microseconds 3 digital

Ref: http://php.net/manual/en/function.date.php