Have a look at Sonoff Basic Smart Switches. You can control them over WIFI with your phone, Google Assistant or Amazon Alexa. Perfect timings everytime, they automatically adjust for regional DST, in nearly 2 years of using one to control my lights it has failed to work once. You can set them so you get a notification on your phone when it switches on and off, so you know if it has failed to work. If it does fail to work you can turn it on or off from your phone remotely from anywhere in the world.