Countdown provides a fancy text display while it counts down to zero from a starting point you provide. The user can pause and resume the countdown from the text user interface.

Utility that fakes the system time by pre-loading a small library that modifies the time, gettimeofday and clock_gettime system calls.

This module parses the most common forms of ISO 8601 date strings (e.g. 2007-01-14T20:34:22+00:00) into datetime objects.

Python-isodate is a python module for parsing and formatting ISO 8601 dates, time and duration.

This package contains a library for parsing ISO 8601 datetime strings.

This package includes the necessary headers for using LinuxPPS PPSAPI kernel interface in user-space applications, and several support tools.

The main purpose of this package is to provide more complex arithmetic operations on dates/times. Heavy use is made of the relativedelta type from the dateutil library. Much of this package is just a light wrapper on top of this with some added features such as range generation and business day calculation.

This library brings the Olson tz database into Python. It allows accurate and cross platform timezone calculations using Python 2.4 or higher. It also solves the issue of ambiguous times at the end of daylight saving time. Almost all of the Olson timezones are supported.

Arrow is a Python library to creating, manipulating, formatting and converting dates, times, and timestamps. It implements and updates the datetime type.

Time is a command that displays information about the resources that a program uses. The display output of the program can be customized or saved to a file.

Pendulum is a drop-in replacement for the standard datetime class, providing an alternative API. As it inherits from the standard datetime all datetime instances can be replaced by Pendulum instances.

Python library for generating and parsing RFC 3339-compliant timestamps.

This package provides functionality for utilizing the relativedelta feature from the dateutil library, ensuring calendar precision with aniso8601.

mbed TLS, formerly known as PolarSSL, makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols. It is provided in the form of a C library to support the protocols, as well as to parse and write X.509, PKCS #12, OpenPGP and other required structures.

The ASN.1 to C compiler takes ASN.1 module files and generates C++ compatible C source code. That code can be used to serialize the native C structures into compact and unambiguous BER/XER/PER-based data files, and deserialize the files back.

Various ASN.1 based formats are widely used in the industry, such as to encode the X.509 certificates employed in the HTTPS handshake, to exchange control data between mobile phones and cellular networks, to car-to-car communication in intelligent transportation networks.

Dehydrated is a client for obtaining certificates from an ACME server (such as Let's Encrypt) implemented as a relatively simple Bash script.

OpenSSL is an implementation of SSL/TLS.

Crypt::OpenSSL::RSA does RSA encoding and decoding (using the OpenSSL libraries).

This package provides Guile bindings to GnuTLS, a library implementation the TLS protocol. It supersedes the Guile bindings that were formerly provided as part of GnuTLS.

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols. It is provided in the form of a C library to support the protocols, as well as to parse and write X.509, PKCS #12, OpenPGP and other required structures.

ACME protocol implementation in Python

Certbot automatically receives and installs X.509 certificates to enable Transport Layer Security (TLS) on servers. It interoperates with the Let’s Encrypt certificate authority (CA), which issues browser-trusted certificates for free.

The Crypt::OpenSSL::Guess Perl module provides helpers to guess the correct OpenSSL include path. It is intended for use in your Makefile.PL.