Is it safe to take multiple daily vitamin supplements?

What For? For what purpose are you doing so? It may not be wise to take them once a day, let alone multiple times. If you have a known deficiency in a vitamin, try to address the deficiency from whole foods and for vitamin d, from the sun. See this website. otherwise, only take what you need. More is not better.
No. There is such a thing as hypervitaminosis (e.g. Vitamin a is teratogenic in excess for reproductive age women) and you are advised to not take multiple daily vitamin supplements. In addition, vitamin supplements have few proven benefits and cost a lot of money. Spend that money on a healthier diet instead.

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