#!/usr/bin/python3

from PyQt5.QtCore import QDate, QTime, QDateTime, Qt

now = QDate.currentDate()

print(now.toString(Qt.ISODate))
print(now.toString(Qt.DefaultLocaleLongDate))

datetime = QDateTime.currentDateTime()

print(datetime.toString())

time = QTime.currentTime()

print(time.toString(Qt.DefaultLocaleLongDate))

结果显示：

2019-10-26
2019年10月26日星期六
周六 10月 26 11:32:40 2019
CST 上午11:32:40

UTC (Universal Coordinated time) time

#!/usr/bin/python3

from PyQt5.QtCore import QDateTime, Qt

now = QDateTime.currentDateTime()

print("Local datetime: ", now.toString(Qt.ISODate))
print("Universal datetime: ", now.toUTC().toString(Qt.ISODate))

print("The offset from UTC is: {0} seconds".format(now.offsetFromUtc()))

输出结果：

Local datetime: 2019-10-26T11:37:54
Universal datetime: 2019-10-26T03:37:54Z
The offset from UTC is: 28800 seconds

daysTo()计算从一个日子到另一日子之间间隔的天数

#!/usr/bin/python3

from PyQt5.QtCore import QDate

xmas1 = QDate(2018, 12, 24)
xmas2 = QDate(2019, 12, 24)

now = QDate.currentDate()

dayspassed = xmas1.daysTo(now)
print("{0} days have passed since last XMas".format(dayspassed))

nofdays = now.daysTo(xmas2)
print("There are {0} days until next XMas".format(nofdays))

输出结果：

306 days have passed since last XMas
There are 59 days until next XMas