Title: Bridge scoring
Content: 100 points are awarded for any one hand holding any four of the five trump suit honors, and ; 150 points are awarded for any one hand holding all five trump suit honors, or all four aces in a notrump contract. In rubber bridge only, a bonus is awarded for any one hand holding four or five of the, i.e. an ace, king, queen, jack or ten. Honors may be declared and scored at any time after the auction but for strategic reasons it is best to do so at the conclusion of play so as not to give the opponents information about the lay of the cards. Honors may be held by any of the four players, including dummy.
Title: Contract bridge
Content:  take turns to call in a clockwise order: each player in turn either passes, doubles – which increases the penalties for not making the contract specified by the opposing partnership's last bid, but also increases the reward for making it – or redoubles, or states a contract that their partnership will adopt, which must be higher than the previous highest bid (if any). Eventually, the player who bid the highest contract – which is determined by the contract's level as well as the trump suit or no trump – wins the contract for their partnership. In the example auction below, the east–west pair secures the contract of 6; 
Title: Contract bridge
Content:  At the end of the hand, points are awarded to the declaring side if they make the contract, or else to the defenders. Partnerships can be, increasing the rewards for making the contract, but also increasing the penalties for undertricks. In rubber bridge, if a side has won 100 contract points, they have won a and are vulnerable for the remaining rounds, but in duplicate bridge, vulnerability is predetermined based on the number of each board. If the declaring side makes their contract, they receive points for, or tricks bid and made in excess of six. In both rubber and duplicate bridge, the declaring side is awarded 20 points per odd trick for 
Title: Contract bridge
Content:  auction concludes when there have been three successive passes. Note that six tricks are added to contract values, so the six-level contract would actually be a contract of twelve tricks. In practice, establishing a contract without enough information on the other partner's hand is difficult, so there exist many bidding systems assigning meanings to bids, with common ones including Standard American, Acol, and 2/1 game forcing. Contrast with Spades, where players only have to bid their own hand. After the contract is decided, and the first lead is made, the declarer's partner (dummy) lays their cards face up on the table, and the declarer plays the dummy's cards 
Title: Contract bridge
Content:  common with solo whist. This game, and variants of it known as "bridge" and "bridge whist",  became popular in the United States and the United Kingdom in the 1890s despite the long-established dominance of whist. Its breakthrough was its acceptance in 1894 by Lord Brougham at London's Portland Club. In 1904 auction bridge was developed, in which the players bid in a competitive auction to decide the contract and declarer. The object became to make at least as many tricks as were contracted for, and penalties were introduced for failing to do so. Auction bridge bidding beyond winning the auction is pointless. If taking all 13 
Title: History of contract bridge
Content:  required 3 in no trumps, 4 in hearts, or 5 in diamonds (although it could not be done at all, undoubled, in clubs or spades); and there were slam bonuses. Despite the popularity of whist, this game, and variants of it, bridge and bridge-whist, became popular in the United States and the UK in the 1890s. In 1904 auction bridge, known for a time as royal auction bridge, was developed where the players bid in a competitive auction to decide the contract and declarer. The object became to make at least as many tricks as were contracted for and penalties were introduced for failing to do so. The modern game of contract bridge was the result of 
Title: Contract bridge
Content:  well as their own. The opposing partnership is called the, and their goal is to stop the declarer from fulfilling his contract. Once all the cards have been played, the hand is scored: if the declaring side make their contract, they receive points based on the level of the contract, with some trump suits being worth more points than others and no trump being the highest, as well as bonus points for. But if the declarer fails to fulfil the contract, the defenders receive points depending on the declaring side's undertricks (the number of tricks short of the contract) and whether the contract was doubled by the defenders.
Title: Bridge scoring
Content:  honor bonus is received by any player at the end of any deal in which he held particular honor cards. A partial-game bonus is received at the end of each deal for any partial game contract bid and made ; A game bonus is received at the end of each deal for any game contract bid and made Bridge scoring consists of nine elements. Not all elements are included in all game variants and the method of accumulation of the elements over several deals varies. If the contract is made, the score for each such deal consists of: If the contract is defeated, the defenders receive In rubber bridge only, In duplicate bridge only,
Title: Contract bridge
Content:  The player from the declaring side who first bid the denomination named in the final contract becomes declarer. The player left to the declarer leads to the first trick. Dummy then lays his or her cards face up on the table, organized in columns by suit. Play proceeds clockwise, with each player required to follow suit if possible. Tricks are won by the highest trump, or if there were none played, the highest card of the led suit. The player who won the previous trick leads to the next trick. The declarer has control of the dummy's cards and tells his partner which card to play at dummy's 
Title: Contract bridge
Content:  The dealer opens the auction and can make the first call, and the auction proceeds clockwise. When it is their turn to call, a player may pass – but can enter into the bidding later – or bid a contract, specifying the level of their contract and either the trump suit or no trump (the denomination), provided that it is higher than the last bid by any player, including their partner. All bids promise to take a number of tricks in excess of six, so a bid must be between one (seven tricks) and seven (thirteen tricks). A bid is higher than another bid if either the level is greater (e.g., 2 over 1NT) or the denomination is higher, with the order being in ascending order:, , , , and NT (no trump). Calls may be made orally, or with a bidding box, or digitally in online bridge. 

Question: when do you declare honors in contract bridge?
Answer: any time after the auction.