Multi-thread safe

[krpot]

I like your library and it's very readable and use to fun. One thing I am wondering is if there is any multi-thread issue because your implementation has one instance.

internal val calendar: Calendar by lazy {
Calendar.getInstance(DateHelper.getSydneyTimeZone())
}

From my understanding, lazy it doesn't create more than one instance and when thread1 and thread2 tries to update date, it think there could be a race condition. What do you think?

[urgentx]

Kotlin's lazy delegate is synchronized by default: multiple threads will see the same value.

[urgentx]

@krpot However yes; you are right, since the underlying Calendar instance is shared and is not thread-safe. Perhaps it would be better to use Calendar.getInstance() every time.