First & Last light
There is little else more uplifting than getting out of a car under the veil of darkness and watching the rising sun slowly reveal the day. Similarly witnessing the setting sun dipping over the distant horizon bathes the earth in the most sublime light. These are unsurprisingly the best times to capture stunning images. Especially where your camera is a mobile phone. Luckily I always have mine with me [don't we all!] so I manage to capture an image or two that fills me with the joy of that precise moment.