*Last updated: 2023-03-16.*
# Module: tf_quant_finance.datetime.periods
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Date periods.
## Classes
[`class PeriodTensor`](../../tf_quant_finance/datetime/PeriodTensor.md): Represents a tensor of time periods.
## Functions
[`day(...)`](../../tf_quant_finance/datetime/periods/day.md)
[`days(...)`](../../tf_quant_finance/datetime/periods/days.md)
[`month(...)`](../../tf_quant_finance/datetime/periods/month.md)
[`months(...)`](../../tf_quant_finance/datetime/periods/months.md)
[`week(...)`](../../tf_quant_finance/datetime/periods/week.md)
[`weeks(...)`](../../tf_quant_finance/datetime/periods/weeks.md)
[`year(...)`](../../tf_quant_finance/datetime/periods/year.md)
[`years(...)`](../../tf_quant_finance/datetime/periods/years.md)